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

Q: Sentence: 'a woman walking with a child that is in a wheelchair'. Find frequency of the letter 'k'

A: 1
****
Q: Sentence: 'a small wrinkley dog wearing a bow tie'. Find frequency of the letter 'e'

A: 3
****
Q: Sentence: 'a man who is standing in front of a tower with a clock'. Find frequency of the letter 'n'

A:
5
****