instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'decorated baseball cake in a clear plastic box'. Find frequency of the letter 'k'
answer:
1


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


question:
Sentence: 'a baseball game is being played in a city park'. Find frequency of the letter 'g'
answer:

2