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

[EX Q]: Sentence: 'people plating cake in an office meeting room'. Find frequency of the letter 'g'
[EX A]: 2

[EX Q]: Sentence: 'a woman with short, brown hair is looking into a circular mirror and holding a camera up to her cheek'. Find frequency of the letter 'e'
[EX A]: 4

[EX Q]: Sentence: 'two children playing with blue bowls by a bed'. Find frequency of the letter 'b'
[EX A]:
4