instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a person is water skiing and there are birds flying around above them'. Find frequency of the letter 'n'
answer:
5


question:
Sentence: 'a small doughnut held in a persons hand'. Find frequency of the letter 'n'
answer:
4


question:
Sentence: 'a herd of giraffes running in the grass'. Find frequency of the letter 's'
answer:

3