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 man flying through the air on a bicycle'. Find frequency of the letter 'u'
[A]: 1


[Q]: Sentence: 'vegetables like broccoli and tomatoes in a sauce'. Find frequency of the letter 'g'
[A]:
1