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

Q: Sentence: 'group of snowboarders on a snowy trail overlooking a mountain'. Find frequency of the letter 'r'

A: 5
****
Q: Sentence: 'small black bird with red on its head standing on a tree branch'. Find frequency of the letter 'b'

A: 3
****
Q: Sentence: 'a group of people standing around a space rocket'. Find frequency of the letter 'o'

A:
5
****