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

[Q]: Sentence: 'three people are gathered around sitting on a park bench'. Find frequency of the letter 'g'
[A]: 2


[Q]: Sentence: 'a baby calf has a tag on its right ear'. Find frequency of the letter 'n'
[A]: 1


[Q]: Sentence: 'a show car parked with its hood open and a teddy bear tucked into the engine well'. Find frequency of the letter 'o'
[A]:
5