instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a dog sitting in the back of a truck flat bed'. Find frequency of the letter 'h'
answer:
1


question:
Sentence: 'some food on plates next to each other on a table'. Find frequency of the letter 'e'
answer:
6


question:
Sentence: 'a person holding an umbrella on a walkway'. Find frequency of the letter 'n'
answer:

4