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

[Q]: Sentence: 'party cakes in plastic containers, with a cake with a plastic santa claus and reindeer on top'. Find frequency of the letter 's'
[A]: 6


[Q]: Sentence: 'a group of cars and house on truck passing in a street'. Find frequency of the letter 'i'
[A]: 2


[Q]: Sentence: 'a bedroom has a very antique look to it'. Find frequency of the letter 't'
[A]:
3