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

Q: Sentence: 'two men with colorful ties are posing for a picture'. Find frequency of the letter 'r'

A: 4
****
Q: Sentence: 'three birds are sitting on a tree in a forest'. Find frequency of the letter 'h'

A: 1
****
Q: Sentence: 'a bird is standing on the ledge of the building'. Find frequency of the letter 't'

A:
3
****