instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a large cooked pizza on a dining table'. Find frequency of the letter 'n'
answer:
3


question:
Sentence: 'a group of people standing around a table filled with assorted electronic devices'. Find frequency of the letter 'w'
answer:
1


question:
Sentence: 'a bed and some pillows on a bed in a room'. Find frequency of the letter 's'
answer:

2