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

Q: Sentence: 'a girl playing with a frisbee while people watch'. Find frequency of the letter 'e'

A: 5
****
Q: Sentence: 'a jet that is flying in the sky with a banner behind it'. Find frequency of the letter 'r'

A: 1
****
Q: Sentence: 'a person standing in a reflection by a television'. Find frequency of the letter 'e'

A:
5
****