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

[EX Q]: Sentence: 'a man riding his skateboard down low as he turns'. Find frequency of the letter 'g'
[EX A]: 1

[EX Q]: Sentence: 'a woman in a messy kitchen with a child'. Find frequency of the letter 'a'
[EX A]: 4

[EX Q]: Sentence: 'a bus is driving on the street behind some cars'. Find frequency of the letter 'a'
[EX A]:
2