instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a bus is stopped in front of a graphic statue'. Find frequency of the letter 'e'
answer:
2


question:
Sentence: 'a person on a surfboard in the surf of a wave'. Find frequency of the letter 's'
answer:
3


question:
Sentence: 'a woman playing with her dog and a frisbee in the park'. Find frequency of the letter 'a'
answer:

6