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

[Q]: Sentence: 'the meal is served and ready to be eaten'. Find frequency of the letter 'e'
[A]: 8

[Q]: Sentence: 'an image of a street sign with a corner restaurant'. Find frequency of the letter 'u'
[A]: 1

[Q]: Sentence: 'a cat lays down inside of a drawer'. Find frequency of the letter 'f'
[A]:
1