instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a child sitting a table with a pizza in front of him'. Find frequency of the letter 'h'
answer:
3


question:
Sentence: 'a large formal living room with yellow couches and table'. Find frequency of the letter 'v'
answer:
1


question:
Sentence: 'a man is in the air on a skateboard'. Find frequency of the letter 'n'
answer:

3