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

Q: Sentence: 'a close up of a bird on the outside window sill'. Find frequency of the letter 'c'

A: 1
****
Q: Sentence: 'a flock of sheep grazing in a park'. Find frequency of the letter 'f'

A: 2
****
Q: Sentence: 'a group of cows laying next to some trees'. Find frequency of the letter 'o'

A:
5
****