instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a man flying through the air on top of a skateboard'. Find frequency of the letter 'r'
answer:
3

question:
Sentence: 'the sun goes down over a bike tied to a bench at the beach'. Find frequency of the letter 't'
answer:
5

question:
Sentence: 'we are looking at an old photo of a rundown street'. Find frequency of the letter 'o'
answer:
7