instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a woman walking with a child that is in a wheelchair'. Find frequency of the letter 'k'
answer:
1


question:
Sentence: 'pedestrian in stripe clothing standing on street corner'. Find frequency of the letter 's'
answer:
4


question:
Sentence: 'a white paper topped with square slices of pizza'. Find frequency of the letter 's'
answer:

3