instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a mixed bouquet of flowers in a glass vase set before a window'. Find frequency of the letter 'w'
answer:
3


question:
Sentence: 'a large bathroom with marble floor, counter, and bath'. Find frequency of the letter 'f'
answer:
1


question:
Sentence: 'a bathroom with a slanted roof and block glass windows'. Find frequency of the letter 'l'
answer:

3