TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'man sitting on the side of a van playing the guitar'. Find frequency of the letter 'm'

SOLUTION: 1

PROBLEM: Sentence: 'a small wrinkley dog wearing a bow tie'. Find frequency of the letter 'e'

SOLUTION: 3

PROBLEM: Sentence: 'two chinese men competing playing the nintendo wii'. Find frequency of the letter 'p'

SOLUTION:
2