TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a man that is on his cell phone'. Find frequency of the letter 's'

SOLUTION: 2

PROBLEM: Sentence: 'black and white photograph of man and woman sitting on a bench'. Find frequency of the letter 'w'

SOLUTION: 2

PROBLEM: Sentence: 'a cat on the back of a maroon chair waving its paw at a dog sitting in the seat part of the chair'. Find frequency of the letter 'i'

SOLUTION:
7