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

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


[Q]: Sentence: 'a cat sprawls out and sleeps on its back on a lounge chair with an acorn theme'. Find frequency of the letter 'r'
[A]: 3


[Q]: Sentence: 'a man enjoying the weather and having dinner on the balcony'. Find frequency of the letter 'n'
[A]:
9