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

Q: Sentence: 'a small white dog looking out a car window'. Find frequency of the letter 'l'

A: 3
****
Q: Sentence: 'a photo of a toilet which is not clean'. Find frequency of the letter 'w'

A: 1
****
Q: Sentence: 'there is a man sitting on steps smoking a cigarette'. Find frequency of the letter 'e'

A:
5
****