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

[Q]: Sentence: 'a white paper plate with a slice of pizza on it'. Find frequency of the letter 'h'
[A]: 2


[Q]: Sentence: 'a teddy bear is sitting on a heart shaped patio chair outside'. Find frequency of the letter 'i'
[A]: 6


[Q]: Sentence: 'a person wearing colorful gear doing tricks on skis'. Find frequency of the letter 'r'
[A]:
5