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

[Q]: Sentence: 'children with scissors and construction paper in a school classroom'. Find frequency of the letter 'c'
[A]: 6


[Q]: Sentence: 'tow birds flying by a long necked crane'. Find frequency of the letter 'f'
[A]: 1


[Q]: Sentence: 'a man on a skateboard going down a ramp while people are watching'. Find frequency of the letter 'w'
[A]:
3