instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a person riding a camel in front of a truck'. Find frequency of the letter 't'
answer:
2


question:
Sentence: 'a blue train on a track next to another track'. Find frequency of the letter 'c'
answer:
2


question:
Sentence: 'a young woman dressed in green and black operating a remote control'. Find frequency of the letter 'r'
answer:

5