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 men standing around a table cutting a cake'. Find frequency of the letter 'g'
answer:
3


question:
Sentence: 'two zebras standing around while a third zebra drinks from a pond'. Find frequency of the letter 's'
answer:
3


question:
Sentence: 'a dried up riverbed could be a dangerous place to play frisbee'. Find frequency of the letter 'a'
answer:

5