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

Q: Sentence: 'a little boy sitting on a bed in a bedroom'. Find frequency of the letter 'e'

A: 3
****
Q: Sentence: 'a man and a woman are walking down the street with an umbrella over their heads'. Find frequency of the letter 'w'

A: 4
****
Q: Sentence: 'a close up of a public transit bus'. Find frequency of the letter 'c'

A:
2
****