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

[EX Q]: Sentence: 'a family sitting at a table in a restaurant looking at their phones'. Find frequency of the letter 't'
[EX A]: 8

[EX Q]: Sentence: 'a dog on a couch near many pillows'. Find frequency of the letter 'p'
[EX A]: 1

[EX Q]: Sentence: 'a table holding books, apples and remote below a window'. Find frequency of the letter 'h'
[EX A]:
1