instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'there is a stop sign that has a reflection in a puddle'. Find frequency of the letter 'e'
answer:
5


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


question:
Sentence: 'a young man standing next to a base on top of a small baseball field'. Find frequency of the letter 's'
answer:

4