instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a toilet sits in a cluttered bathroom next to a sink'. Find frequency of the letter 'a'
answer:
4


question:
Sentence: 'hand holding a white calculator inside a store'. Find frequency of the letter 'o'
answer:
3


question:
Sentence: 'a young girl holds a yellow toothbrush in her mouth'. Find frequency of the letter 'w'
answer:

1