instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a man on a skateboard going down a ramp while people are watching'. Find frequency of the letter 'w'
answer:
3


question:
Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'
answer:
1


question:
Sentence: 'a young man in a striped purple dress shirt and black vest'. Find frequency of the letter 't'
answer:

3