instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a half eaten doughnut in a persons hand'. Find frequency of the letter 'h'
answer:
3


question:
Sentence: 'a grapefruit, toast, coffee and other items are on a tray'. Find frequency of the letter 't'
answer:
6


question:
Sentence: 'some guys sitting on a blanket at the park while eating some hot dogs'. Find frequency of the letter 'n'
answer:

4