TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'tow birds flying by a long necked crane'. Find frequency of the letter 'f'

SOLUTION: 1

PROBLEM: Sentence: 'a small white plane sitting on top of the ocean'. Find frequency of the letter 'e'

SOLUTION: 4

PROBLEM: Sentence: 'a vadalised building made to look as if it is smiling'. Find frequency of the letter 'a'

SOLUTION:
5