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

[Q]: Sentence: 'a burning wood stove has a tea pot sitting on top of it and is full of wood'. Find frequency of the letter 'a'
[A]: 5


[Q]: Sentence: 'a grapefruit, toast, coffee and other items are on a tray'. Find frequency of the letter 't'
[A]: 6


[Q]: Sentence: 'a large dog wearing a purple pimp hat'. Find frequency of the letter 'p'
[A]:
4