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: 'a couple is cutting in to a cake at a wedding'. Find frequency of the letter 'd'
answer:
2


question:
Sentence: 'a plane taking off toward the cloudy sky'. Find frequency of the letter 'i'
answer:

1