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

[EX Q]: Sentence: 'a bowl of granola with raspberries and honey on top with a spoon'. Find frequency of the letter 'w'
[EX A]: 3

[EX Q]: Sentence: 'black and white photograph of man and woman sitting on a bench'. Find frequency of the letter 'w'
[EX A]: 2

[EX Q]: Sentence: 'pedestrians walk in the street passed a stop sign'. Find frequency of the letter 's'
[EX A]:
7