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

[EX Q]: Sentence: 'a man flying through the air on top of a skateboard'. Find frequency of the letter 'r'
[EX A]: 3

[EX Q]: Sentence: 'a man opening up a package sitting on a couch'. Find frequency of the letter 'n'
[EX A]: 5

[EX Q]: Sentence: 'a woman is laying on the bed with her feet in a suitcase'. Find frequency of the letter 't'
[EX A]:
4