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

[Q]: Sentence: 'the ingredients are ready on the wooden table'. Find frequency of the letter 'w'
[A]: 1


[Q]: Sentence: 'group of snowboarders on a snowy trail overlooking a mountain'. Find frequency of the letter 'r'
[A]: 5


[Q]: Sentence: 'one man catches a frisbee while another has his hands up'. Find frequency of the letter 'n'
[A]:
4