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

[Q]: Sentence: 'a large formal living room with yellow couches and table'. Find frequency of the letter 'v'
[A]: 1


[Q]: Sentence: 'a desk covered in notepads, a laptop and other devices'. Find frequency of the letter 'c'
[A]: 2


[Q]: Sentence: 'a public transportation bus sits by the sidewalk on a snowy day'. Find frequency of the letter 'i'
[A]:
4