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

[Q]: Sentence: 'two people are riding on canoes down a river'. Find frequency of the letter 'e'
[A]: 5


[Q]: Sentence: 'the child is waving a small flag as she stands near two women'. Find frequency of the letter 'g'
[A]: 2


[Q]: Sentence: 'two cats sticking their heads in a sink'. Find frequency of the letter 'n'
[A]:
3