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

Q: Sentence: 'a guy surfs a wave with his surfboard'. Find frequency of the letter 's'

A: 4
****
Q: Sentence: 'a girl playing with a frisbee while people watch'. Find frequency of the letter 'e'

A: 5
****
Q: Sentence: 'there are people playing tennis on the court'. Find frequency of the letter 's'

A:
1
****