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

Sentence: 'some cubbies with towels in a blue bathroom'. Find frequency of the letter 'l'
2

Sentence: 'black and white photograph of man and woman sitting on a bench'. Find frequency of the letter 'w'
2

Sentence: 'a stop sign at a residential street intersection'. Find frequency of the letter 'i'

5