added the docstrings in the functions

Author: vivek2004-sec

strings/frequency_finder.py

@@ -36,6 +36,9 @@
 
 
 def get_letter_count(message: str) -> dict[str, int]:
+    '''get_letter_count() is a function that takes message as parameter which is 
+    supposed to be the string. and it returns a dictionary where string is a key 
+    and integer is a value.'''
     letter_count = dict.fromkeys(string.ascii_uppercase, 0)
     for letter in message.upper():
         if letter in LETTERS:
@@ -45,6 +48,7 @@ def get_letter_count(message: str) -> dict[str, int]:
 
 
 def get_item_at_index_zero(x: tuple) -> str:
+    '''It takes x as parameter which is tuple and returns a string.'''
     return x[0]