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

Q: Sentence: 'a blue fire hydrant painted on the bottom of it'. Find frequency of the letter 'h'

A: 2
****
Q: Sentence: 'person wearing all white leaned up against a wall with a yellow sign'. Find frequency of the letter 'a'

A: 8
****
Q: Sentence: 'a parade with people, horeses, and carriages walking'. Find frequency of the letter 'w'

A:
2
****