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

[Q]: Sentence: 'old double decker bus parked in a lot'. Find frequency of the letter 't'
[A]: 1


[Q]: Sentence: 'food sitting in bowls on table with checked tablecloth'. Find frequency of the letter 't'
[A]: 6


[Q]: Sentence: 'a cat with a cone on its head by some shoes'. Find frequency of the letter 'y'
[A]:
1