instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a woman sitting in front of a giant slice of cheese pizza'. Find frequency of the letter 'e'
answer:
4


question:
Sentence: 'a tall building with antenna stands before a jet flying in the background'. Find frequency of the letter 't'
answer:
6


question:
Sentence: 'some people sitting on surfboards in the water'. Find frequency of the letter 't'
answer:

4