instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'there is a sandwich with a lot of meat cut in half'. Find frequency of the letter 'a'
answer:
5


question:
Sentence: 'people fishing and enlarge mountainlake with trees lining the shoreline'. Find frequency of the letter 't'
answer:
4


question:
Sentence: 'green bananas and other vegetables at a produce market'. Find frequency of the letter 'e'
answer:

8