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

[Q]: Sentence: 'a person with some scissors over a bowl'. Find frequency of the letter 's'
[A]: 6


[Q]: Sentence: 'the small black and white dog holds onto a frisbee'. Find frequency of the letter 'h'
[A]: 3


[Q]: Sentence: 'a mother elephant and her baby are standing inside a grassy enclosure'. Find frequency of the letter 'r'
[A]:
5