instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'there are two men sitting on a couch playing video games'. Find frequency of the letter 'v'
answer:
1


question:
Sentence: 'a group of people stand inside of a big room'. Find frequency of the letter 'o'
answer:
6


question:
Sentence: 'a view of very old ships in a harbor, with building behind them'. Find frequency of the letter 'd'
answer:

3