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 chair and umbrella on a sandy beach'. Find frequency of the letter 's'

A: 1
****
Q: Sentence: 'a piece of bread stuffed with meat and vegetables'. Find frequency of the letter 's'

A:
2
****