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

[Q]: Sentence: 'a man that is on his cell phone'. Find frequency of the letter 's'
[A]: 2


[Q]: Sentence: 'a dog on a couch near many pillows'. Find frequency of the letter 'p'
[A]: 1


[Q]: Sentence: 'two wine glasses sit next to a vase'. Find frequency of the letter 's'
[A]:
5