diff --git a/app/main.py b/app/main.py
new file mode 100644
index 0000000..e613d44
--- /dev/null
+++ b/app/main.py
@@ -0,0 +1,2 @@
+def count_occurrences(phrase: str, letter: str) -> int:
+    return phrase.lower().count(letter.lower())