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

[Q]: Sentence: 'a little boy standing near a couch and a table'. Find frequency of the letter 'i'
[A]: 2


[Q]: Sentence: 'a couple of people are sitting at a table'. Find frequency of the letter 'e'
[A]: 5


[Q]: Sentence: 'the man in the stocking cap is holding a colorful pastry'. Find frequency of the letter 'l'
[A]:
3