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: 'an image of a street sign with a corner restaurant'. Find frequency of the letter 'u'
answer:
1


question:
Sentence: 'a person that is writing a motorcycle on the street'. Find frequency of the letter 't'
answer:

7