instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a group of giraffes walk together by a hill'. Find frequency of the letter 'b'
answer:
1


question:
Sentence: 'a man hits a tennis ball with a racket on the court'. Find frequency of the letter 'c'
answer:
2


question:
Sentence: 'small shallow toilet in a square stall next to a roll of toilet paper'. Find frequency of the letter 't'
answer:

7