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

Q: Sentence: 'people waiting on a train platform in a wooded area'. Find frequency of the letter 'p'

A: 3
****
Q: Sentence: 'a bus with two floors belonging to london country'. Find frequency of the letter 't'

A: 4
****
Q: Sentence: 'several people standing on a street corner with the heinz building in the background'. Find frequency of the letter 'o'

A:
4
****