instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a picture of two computers on a table'. Find frequency of the letter 'r'
answer:
2


question:
Sentence: 'food sitting in bowls on table with checked tablecloth'. Find frequency of the letter 't'
answer:
6


question:
Sentence: 'a small bathroom with pink tile and flowered wallpaper'. Find frequency of the letter 'r'
answer:

3