instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'men are riding on motorcycles with a man riding in their carriers'. Find frequency of the letter 'r'
answer:
8

question:
Sentence: 'a man flying through the air on top of a skateboard'. Find frequency of the letter 'r'
answer:
3

question:
Sentence: 'a photo of a person on the beach flying a kite'. Find frequency of the letter 'g'
answer:
1