instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'two men are playing a video game as another sits watching'. Find frequency of the letter 'a'
answer:
7

question:
Sentence: 'a black bear sitting in the grass taking a rest'. Find frequency of the letter 'a'
answer:
6

question:
Sentence: 'a man riding a skateboard on a metal platform'. Find frequency of the letter 'a'
answer:
8