instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a man makes some cock tales at a desk'. Find frequency of the letter 'k'
answer:
3

question:
Sentence: 'a man in a suit makes the first slice into a cake'. Find frequency of the letter 't'
answer:
4

question:
Sentence: 'several people standing on a street corner with the heinz building in the background'. Find frequency of the letter 'o'
answer:
4