instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a small dog sits in the rear window of a car'. Find frequency of the letter 'm'
answer:
1


question:
Sentence: 'men standing in the grass with a frisbee'. Find frequency of the letter 'a'
answer:
3


question:
Sentence: 'young boy brushing his teeth in the bathroom'. Find frequency of the letter 'h'
answer:

5