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

Q: Sentence: 'a young girl is brushing her teeth in this dated photo'. Find frequency of the letter 't'

A: 5
****
Q: Sentence: 'a sailboat is floating near the rocky shore of a beach'. Find frequency of the letter 'o'

A: 5
****
Q: Sentence: 'a person flying through the air while riding a snowboard'. Find frequency of the letter 'd'

A:
2
****