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: 'a couple of items that are on the wall'. Find frequency of the letter 'm'

A: 1
****
Q: Sentence: 'a dog is looking through a mirror at the viewer'. Find frequency of the letter 'e'

A:
3
****