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

Q: Sentence: 'a yellow and green train on a train track in a wooded area'. Find frequency of the letter 'o'

A: 4
****
Q: Sentence: 'some cubbies with towels in a blue bathroom'. Find frequency of the letter 'l'

A: 2
****
Q: Sentence: 'two people holding snow boards walking on a snowy surface'. Find frequency of the letter 'p'

A:
2
****