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

Q: Sentence: 'a green bus driving in a street filled with heavy traffic'. Find frequency of the letter 'v'

A: 2
****
Q: Sentence: 'a man hits a tennis ball with a racket on the court'. Find frequency of the letter 'c'

A: 2
****
Q: Sentence: 'two men lead an elephant down a road beside a building'. Find frequency of the letter 'e'

A:
6
****