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

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


[Q]: Sentence: 'a couple of girls are hanging out at a restaurant'. Find frequency of the letter 'l'
[A]: 2


[Q]: Sentence: 'some fruit in case and wrapping on a concrete'. Find frequency of the letter 'a'
[A]:
4