instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a white bathroom sink sitting next to a toilet'. Find frequency of the letter 'i'
answer:
5


question:
Sentence: 'a man standing in front of a statue near a metal pole'. Find frequency of the letter 'f'
answer:
2


question:
Sentence: 'a train station with a train pulling into the platform'. Find frequency of the letter 'i'
answer:

6