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

[Q]: Sentence: 'the child is waving a small flag as she stands near two women'. Find frequency of the letter 'g'
[A]: 2


[Q]: Sentence: 'a man serving himself pizza in a wooden booth'. Find frequency of the letter 'n'
[A]: 4


[Q]: Sentence: 'an asian woman holding a nintendo wii game controller'. Find frequency of the letter 'a'
[A]:
6