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

[Q]: Sentence: 'people plating cake in an office meeting room'. Find frequency of the letter 'g'
[A]: 2


[Q]: Sentence: 'a blue bowl holding mashed bananas and oatmeal with a bottle of sugar and cinnamon sitting beside it'. Find frequency of the letter 'g'
[A]: 3


[Q]: Sentence: 'a young woman walks in the rain, smiling and holding an umbrella'. Find frequency of the letter 'n'
[A]:
8