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

Q: Sentence: 'a photo of a toilet which is not clean'. Find frequency of the letter 'w'

A: 1
****
Q: Sentence: 'a man riding on the back of a white horse next to other horses'. Find frequency of the letter 'o'

A: 6
****
Q: Sentence: 'a passenger train that is going over a bridge'. Find frequency of the letter 't'

A:
3
****