instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a person on a skateboard going down a ramp'. Find frequency of the letter 'n'
answer:
4


question:
Sentence: 'a log in the water with three birds perched on it'. Find frequency of the letter 'r'
answer:
4


question:
Sentence: 'a group of boat laying on a beach'. Find frequency of the letter 'p'
answer:

1