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

[EX Q]: Sentence: 'a man on a skateboard going down a ramp while people are watching'. Find frequency of the letter 'w'
[EX A]: 3

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

[EX Q]: Sentence: 'an asian man holding a white suit case'. Find frequency of the letter 'h'
[EX A]:
2