instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a bus is stopped in front of a graphic statue'. Find frequency of the letter 'e'
answer:
2


question:
Sentence: 'a boy that is sitting at a table with pizza'. Find frequency of the letter 's'
answer:
2


question:
Sentence: 'a zebra walks up to another one in the the grass beside some trees'. Find frequency of the letter 's'
answer:

6