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

Q: Sentence: 'a surfer wipes out on a huge wave'. Find frequency of the letter 'a'

A: 3
****
Q: Sentence: 'a man standing on a surf board in the ocean'. Find frequency of the letter 'f'

A: 1
****
Q: Sentence: 'different types of street signs on a post'. Find frequency of the letter 'e'

A:
5
****