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 group of people walking down a rain soaked street with umbrellas'. Find frequency of the letter 'w'

A: 3
****
Q: Sentence: 'a red train with graffiti pulled into the station'. Find frequency of the letter 'i'

A:
6
****