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

Q: Sentence: 'pedestrian in stripe clothing standing on street corner'. Find frequency of the letter 's'

A: 4
****
Q: Sentence: 'a red building with a crowd of people outside it near the water'. Find frequency of the letter 'e'

A: 7
****
Q: Sentence: 'a man laying on a surfboard  surfing in the surf'. Find frequency of the letter 'o'

A:
2
****