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: 'a few men walking through a market place'. Find frequency of the letter 'f'
answer:
1


question:
Sentence: 'mature couple in a bed in a cabin with table lights'. Find frequency of the letter 'u'
answer:

2