diff --git a/pages/index.tsx b/pages/index.tsx
index 847eb97..0d76a5d 100644
--- a/pages/index.tsx
+++ b/pages/index.tsx
@@ -127,7 +127,7 @@ export default function Main() {
           />
           {" Hz "}
           <aside>
-            (wavelength: {(1000 / parseFloat(frequency)).toFixed(4)} ms)
+            (period: {(1000 / parseFloat(frequency)).toFixed(4)} ms)
           </aside>
         </section>
       </main>