instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a photo of a small boat on a shore'. Find frequency of the letter 'f'
answer:
1


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


question:
Sentence: 'two people skiing down a hill, with pine trees in the background'. Find frequency of the letter 'h'
answer:

3