instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a black bear sitting in the grass taking a rest'. Find frequency of the letter 'a'
answer:
6

question:
Sentence: 'a herd of horses standing next to each other on a field'. Find frequency of the letter 'r'
answer:
3

question:
Sentence: 'a women who is walking down the street with a piece of luggage'. Find frequency of the letter 'e'
answer:
7