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

[Q]: Sentence: 'a group of giraffes walk together by a hill'. Find frequency of the letter 'b'
[A]: 1


[Q]: Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'
[A]: 1


[Q]: Sentence: 'a young girl sitting at a table making cookies'. Find frequency of the letter 's'
[A]:
2