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: 'a river with a long dragon boat in it and rowers on the boat in sets of two, along with two other people'. Find frequency of the letter 'h'
[A]: 4


[Q]: Sentence: 'a man riding a horse next to a body of water on a rocky beach'. Find frequency of the letter 'r'
[A]:
4