instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a couple of people are sitting at a table'. Find frequency of the letter 'e'
answer:
5


question:
Sentence: 'large grassy pasture filled with trees and a single horse'. Find frequency of the letter 'l'
answer:
4


question:
Sentence: 'the person that has a lot of flowers around her in a room'. Find frequency of the letter 'e'
answer:

4