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

Q: Sentence: 'a passenger bus that is driving down the street'. Find frequency of the letter 'r'

A: 3
****
Q: Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'

A: 1
****
Q: Sentence: 'a bowel of noodles with vegetables, herbs and sauces'. Find frequency of the letter 'b'

A:
3
****