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

Q: Sentence: 'three men in military suits are sitting on a bench,'. Find frequency of the letter 'a'

A: 3
****
Q: Sentence: 'pedestrians pass by a stop sign, some holding surfboards'. Find frequency of the letter 'n'

A: 3
****
Q: Sentence: 'a dog laying on a sheet on the floor indoors'. Find frequency of the letter 'o'

A:
7
****