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

[EX Q]: Sentence: 'a parking meter painted green with a sign that describes it as not a parking meter'. Find frequency of the letter 's'
[EX A]: 4

[EX Q]: Sentence: 'a bus with two floors belonging to london country'. Find frequency of the letter 't'
[EX A]: 4

[EX Q]: Sentence: 'some vases with assorted plants sitting next to a window'. Find frequency of the letter 'n'
[EX A]:
4