instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a baseball player dropping his bat and starting to run'. Find frequency of the letter 'o'
answer:
2


question:
Sentence: 'this yellow fire hydrant sits in a grass field'. Find frequency of the letter 'i'
answer:
5


question:
Sentence: 'a view of a birthday cake with burning candles awaiting to be blew out'. Find frequency of the letter 'e'
answer:

5