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

Q: Sentence: 'a player swings his bat at a baseball game'. Find frequency of the letter 'p'

A: 1
****
Q: Sentence: 'a group of giraffes walk together by a hill'. Find frequency of the letter 'b'

A: 1
****
Q: Sentence: 'traffic lights signaling to go on the empty street next to the gas station'. Find frequency of the letter 'n'

A:
5
****