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

Q: Sentence: 'a white police vehicle parked on a paved street'. Find frequency of the letter 'a'

A: 4
****
Q: Sentence: 'a small white dog looking out a car window'. Find frequency of the letter 'l'

A: 3
****
Q: Sentence: 'a surfer lies on a surfboard that is  in small waves'. Find frequency of the letter 'm'

A:
1
****