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

Q: Sentence: 'a fluffy white car looking in a mirror'. Find frequency of the letter 'k'

A: 1
****
Q: Sentence: 'a boy catching a frisbee while standing ins bunch of leaves'. Find frequency of the letter 'a'

A: 5
****
Q: Sentence: 'a man is taking a pizza out of a wood fire oven'. Find frequency of the letter 'a'

A:
6
****