In this task, you need to count the number of times the given letter appears in the given sentence.

Q: Sentence: 'a person is riding in a cart pulled by a horse'. Find frequency of the letter 'a'

A: 4
****
Q: Sentence: 'black and white photograph of man and woman sitting on a bench'. Find frequency of the letter 'w'

A: 2
****
Q: Sentence: 'an all girl crowd with one extra excited girl in the middle holding a football, looks like a goalie to me'. Find frequency of the letter 'a'

A:
7
****