instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a cat sprawls out and sleeps on its back on a lounge chair with an acorn theme'. Find frequency of the letter 'r'
answer:
3


question:
Sentence: 'silhouette of person playing frisbee with moutain and sunset'. Find frequency of the letter 'i'
answer:
5


question:
Sentence: 'a black and yellow fire hydrant on a sidewalk'. Find frequency of the letter 'e'
answer:

3