instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a group of three dogs laying on a kitchen floor'. Find frequency of the letter 'r'
answer:
3


question:
Sentence: 'a woman in a tank top reaches out for a frisbee'. Find frequency of the letter 'a'
answer:
6


question:
Sentence: 'a person with a laptop at a table'. Find frequency of the letter 'p'
answer:

3