instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a white toilet sitting next to a toilet paper roller'. Find frequency of the letter 'o'
answer:
4


question:
Sentence: 'a small doughnut held in a persons hand'. Find frequency of the letter 'n'
answer:
4


question:
Sentence: 'two white vases one empty and one filled with flowers'. Find frequency of the letter 'h'
answer:

2