instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a dog on a couch near many pillows'. Find frequency of the letter 'p'
answer:
1


question:
Sentence: 'a white toilet sitting next to a toilet paper roller'. Find frequency of the letter 'o'
answer:
4


question:
Sentence: 'a couple of motor bikes on the side of the street'. Find frequency of the letter 'd'
answer:

1