instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a guy surfs a wave with his surfboard'. Find frequency of the letter 's'
answer:
4


question:
Sentence: 'a young boy standing in front of a counter with dougnuts'. Find frequency of the letter 'o'
answer:
6


question:
Sentence: 'two men who are standing around a table with wine'. Find frequency of the letter 'o'
answer:

3