diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index 55a5c06d7..f4c8f7a40 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -87,7 +87,8 @@ LATIN_IME_CORE_SRC_FILES := \
         dynamic_patricia_trie_writing_utils.cpp) \
     $(addprefix suggest/policyimpl/dictionary/structure/v4/, \
         ver4_dict_constants.cpp \
-        ver4_patricia_trie_policy.cpp) \
+        ver4_patricia_trie_policy.cpp \
+        ver4_patricia_trie_reading_utils.cpp ) \
     $(addprefix suggest/policyimpl/dictionary/utils/, \
         buffer_with_extendable_buffer.cpp \
         byte_array_utils.cpp \
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/probability_dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/probability_dict_content.h
new file mode 100644
index 000000000..daaf08f61
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/probability_dict_content.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2013, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef LATINIME_PROBABILITY_DICT_CONTENT_H
+#define LATINIME_PROBABILITY_DICT_CONTENT_H
+
+#include "defines.h"
+#include "suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h"
+#include "suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h"
+#include "suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_reading_utils.h"
+#include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
+
+namespace latinime {
+
+class ProbabilityDictContent : public SingleDictContent {
+ public:
+    ProbabilityDictContent(const char *const dictDirPath, const bool isUpdatable)
+            : SingleDictContent(dictDirPath, Ver4DictConstants::FREQ_FILE_EXTENSION,
+                    isUpdatable) {}
+
+    int getProbability(const int terminalId) const {
+        if (terminalId < 0 || terminalId >= getSize()) {
+            return NOT_A_PROBABILITY;
+        }
+        return Ver4PatriciaTrieReadingUtils::getProbability(getBuffer(), terminalId);
+    }
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(ProbabilityDictContent);
+
+    int getSize() const {
+        return getBuffer()->getTailPosition() / (Ver4DictConstants::PROBABILITY_SIZE
+                + Ver4DictConstants::FLAGS_IN_PROBABILITY_FILE_SIZE);
+    }
+};
+} // namespace latinime
+#endif /* LATINIME_PROBABILITY_DICT_CONTENT_H */
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h
index e415881a9..4cb96da6a 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h
@@ -39,6 +39,15 @@ class SingleDictContent : public DictContent {
         return mMmappedBuffer.get() != 0;
     }
 
+ protected:
+    BufferWithExtendableBuffer *getWritableBuffer() {
+        return &mExpandableContentBuffer;
+    }
+
+    const BufferWithExtendableBuffer *getBuffer() const {
+        return &mExpandableContentBuffer;
+    }
+
  private:
     DISALLOW_IMPLICIT_CONSTRUCTORS(SingleDictContent);
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_buffers.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_buffers.h
index 1164c408a..333a7c209 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_buffers.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_buffers.h
@@ -18,6 +18,7 @@
 #define LATINIME_VER4_DICT_BUFFER_H
 
 #include "defines.h"
+#include "suggest/policyimpl/dictionary/structure/v4/content/probability_dict_content.h"
 #include "suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h"
 #include "suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h"
 #include "suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h"
@@ -42,10 +43,18 @@ class Ver4DictBuffers {
                 && mShortcutDictContent.isValid();
     }
 
-    AK_FORCE_INLINE const uint8_t *getRawDictBuffer() const {
+    AK_FORCE_INLINE uint8_t *getRawDictBuffer() const {
         return mDictBuffer.get()->getBuffer();
     }
 
+    AK_FORCE_INLINE int getRawDictBufferSize() const {
+        return mDictBuffer.get()->getBufferSize();
+    }
+
+    AK_FORCE_INLINE const ProbabilityDictContent *getProbabilityDictContent() const {
+        return &mProbabilityDictContent;
+    }
+
  private:
     DISALLOW_IMPLICIT_CONSTRUCTORS(Ver4DictBuffers);
 
@@ -54,8 +63,7 @@ class Ver4DictBuffers {
             : mDictBuffer(dictBuffer),
               mTerminalAddressTable(dictDirPath,
                       Ver4DictConstants::TERMINAL_ADDRESS_TABLE_FILE_EXTENSION, isUpdatable),
-              mProbabilityDictContent(dictDirPath, Ver4DictConstants::FREQ_FILE_EXTENSION,
-                      isUpdatable),
+              mProbabilityDictContent(dictDirPath, isUpdatable),
               mBigramDictContent(dictDirPath,
                       Ver4DictConstants::BIGRAM_LOOKUP_TABLE_FILE_EXTENSION,
                       Ver4DictConstants::BIGRAM_CONTENT_TABLE_FILE_EXTENSION,
@@ -67,7 +75,7 @@ class Ver4DictBuffers {
 
     const MmappedBuffer::MmappedBufferPtr mDictBuffer;
     SingleDictContent mTerminalAddressTable;
-    SingleDictContent mProbabilityDictContent;
+    ProbabilityDictContent mProbabilityDictContent;
     SparseTableDictContent mBigramDictContent;
     SparseTableDictContent mShortcutDictContent;
 };
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.cpp
index 0bfd07b04..160259afc 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.cpp
@@ -31,5 +31,7 @@ const char *const Ver4DictConstants::SHORTCUT_CONTENT_TABLE_FILE_EXTENSION =
         ".shortcut_index_shortcut";
 
 const int Ver4DictConstants::NOT_A_TERMINAL = -1;
+const int Ver4DictConstants::PROBABILITY_SIZE = 1;
+const int Ver4DictConstants::FLAGS_IN_PROBABILITY_FILE_SIZE = 1;
 
 } // namespace latinime
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h
index 6498ce428..dcc36d1dc 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h
@@ -35,6 +35,8 @@ class Ver4DictConstants {
     static const char *const SHORTCUT_CONTENT_TABLE_FILE_EXTENSION;
 
     static const int NOT_A_TERMINAL;
+    static const int PROBABILITY_SIZE;
+    static const int FLAGS_IN_PROBABILITY_FILE_SIZE;
 
  private:
     DISALLOW_IMPLICIT_CONSTRUCTORS(Ver4DictConstants);
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_reading_utils.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_reading_utils.cpp
new file mode 100644
index 000000000..3304f1521
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_reading_utils.cpp
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2013, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_reading_utils.h"
+
+#include "suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h"
+#include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
+
+namespace latinime {
+
+/* static */ int Ver4PatriciaTrieReadingUtils::getProbability(
+        const BufferWithExtendableBuffer *const probabilityBuffer, const int terminalId) {
+    int pos = terminalId * (Ver4DictConstants::FLAGS_IN_PROBABILITY_FILE_SIZE
+            + Ver4DictConstants::PROBABILITY_SIZE)
+                    + Ver4DictConstants::FLAGS_IN_PROBABILITY_FILE_SIZE;
+    return probabilityBuffer->readUintAndAdvancePosition(Ver4DictConstants::PROBABILITY_SIZE, &pos);
+}
+
+} // namespace latinime
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_reading_utils.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_reading_utils.h
new file mode 100644
index 000000000..ee369d1e1
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_reading_utils.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2013, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef LATINIME_VER4_PATRICIA_TRIE_READING_UTILS_H
+#define LATINIME_VER4_PATRICIA_TRIE_READING_UTILS_H
+
+#include <stdint.h>
+
+#include "defines.h"
+
+namespace latinime {
+
+class BufferWithExtendableBuffer;
+
+class Ver4PatriciaTrieReadingUtils {
+ public:
+    static int getProbability(const BufferWithExtendableBuffer *const probabilityBuffer,
+            const int terminalId);
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(Ver4PatriciaTrieReadingUtils);
+};
+} // namespace latinime
+#endif /* LATINIME_VER4_PATRICIA_TRIE_READING_UTILS_H */