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

[EX Q]: Sentence: 'some giraffes moving across a big grass field'. Find frequency of the letter 'e'
[EX A]: 3

[EX Q]: Sentence: 'a few giraffes standing in a field looking around'. Find frequency of the letter 'e'
[EX A]: 3

[EX Q]: Sentence: 'older man preparing to blow out a set of candles'. Find frequency of the letter 't'
[EX A]:
3