instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a row of vintage cars in a grassy field'. Find frequency of the letter 'v'
answer:
1


question:
Sentence: 'girls posing of a picture one holding a tennis racket the other wearing a crown'. Find frequency of the letter 'g'
answer:
4


question:
Sentence: 'a small bathroom with a white toilet and vanity and black and white tiled floor'. Find frequency of the letter 'i'
answer:

6