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

[EX 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'
[EX A]: 3

[EX Q]: Sentence: 'people fishing and enlarge mountainlake with trees lining the shoreline'. Find frequency of the letter 't'
[EX A]: 4

[EX Q]: Sentence: 'a man drives a horse and buggy on a sunny day'. Find frequency of the letter 'n'
[EX A]:
5