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

Q: Sentence: 'a dog laying on the back of a boat in the water'. Find frequency of the letter 't'

A: 4
****
Q: Sentence: 'a car accident has slowed traffic as a clean up crew works'. Find frequency of the letter 'f'

A: 2
****
Q: Sentence: 'three men skiing down a mountain on a sunny day'. Find frequency of the letter 'n'

A:
8
****