instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'man is snow gear and skis skiing in the snow'. Find frequency of the letter 'i'
answer:
5


question:
Sentence: 'men are riding on motorcycles with a man riding in their carriers'. Find frequency of the letter 'r'
answer:
8


question:
Sentence: 'a massive crowd of people standing on top of a sandy beach'. Find frequency of the letter 't'
answer:

2