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

Q: Sentence: 'two laptop computers sitting on top of a white table'. Find frequency of the letter 'f'

A: 1
****
Q: Sentence: 'a cat sleeping near lots of pairs of shoes'. Find frequency of the letter 'r'

A: 2
****
Q: Sentence: 'a train stopped on the tracks with it's conductor looking at the camera'. Find frequency of the letter 'n'

A:
4
****