instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'an empty clean kitchen with island, marble countertops , stove and cabinetry'. Find frequency of the letter 'l'
answer:
3


question:
Sentence: 'black and white photograph of man and woman sitting on a bench'. Find frequency of the letter 'w'
answer:
2


question:
Sentence: 'two people play frisbee in a school gym'. Find frequency of the letter 'f'
answer:

1