instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a plate of food, with broccoli and nuts'. Find frequency of the letter 'b'
answer:
1


question:
Sentence: 'a red train traveling down train tracks near a forest'. Find frequency of the letter 'f'
answer:
1


question:
Sentence: 'a woman is sitting on a coach with a laptop'. Find frequency of the letter 'o'
answer:

4