instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'two zebras standing around while a third zebra drinks from a pond'. Find frequency of the letter 's'
answer:
3

question:
Sentence: 'two laptop computers sitting on top of a white table'. Find frequency of the letter 'f'
answer:
1

question:
Sentence: 'a great shot of the ocean with surfers in the background'. Find frequency of the letter 'u'
answer:
2