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

[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 surfer is in the middle of an ocean wave'. Find frequency of the letter 'i'
[EX A]: 3

[EX Q]: Sentence: 'a commuter bus parked in front of  bus stop'. Find frequency of the letter 'p'
[EX A]:
2