instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a bird is perched on a container in a person's hand'. Find frequency of the letter 'c'
answer:
2

question:
Sentence: 'group of snowboarders on a snowy trail overlooking a mountain'. Find frequency of the letter 'r'
answer:
5

question:
Sentence: 'a herd lf elephants walking across a grass covered forest'. Find frequency of the letter 'n'
answer:
2