instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a woman throwing a frisbee on a field'. Find frequency of the letter 's'
answer:
1


question:
Sentence: 'a gray airplane with metal petals on the wings takes off from an airport'. Find frequency of the letter 'i'
answer:
4


question:
Sentence: 'a person sitting at a desk with a cat in front of a keyboard'. Find frequency of the letter 'i'
answer:

4