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

Q: Sentence: 'a bird on a tree is flapping its wings'. Find frequency of the letter 'o'

A: 1
****
Q: Sentence: 'a large motorcycle that has a man dressed in old clothing next to it'. Find frequency of the letter 'a'

A: 6
****
Q: Sentence: 'a woman takes a photo of herself in a rest room mirror'. Find frequency of the letter 'e'

A:
4
****