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

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


[Q]: Sentence: 'this is a sign in front of a large cathedral'. Find frequency of the letter 'a'
[A]: 5


[Q]: Sentence: 'a hand holds a napkin with a doughnut as potatoes sit in the bathroom'. Find frequency of the letter 'b'
[A]:
1