instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'two giraffes, one standing and one laying down'. Find frequency of the letter 'g'
answer:
3


question:
Sentence: 'a close up of a train on a track in the dark'. Find frequency of the letter 'a'
answer:
6


question:
Sentence: 'a man standing in a living room holding a game controller'. Find frequency of the letter 'n'
answer:

7