instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a softball player holding the bat on first base'. Find frequency of the letter 't'
answer:
4

question:
Sentence: 'three men in military suits are sitting on a bench,'. Find frequency of the letter 'a'
answer:
3

question:
Sentence: 'a dog laying on a bed with its head on a teddy bear'. Find frequency of the letter 'a'
answer:
6