instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'black and white photograph of man and woman sitting on a bench'. Find frequency of the letter 'w'
answer:
2


question:
Sentence: 'a dog laying on the back of a boat in the water'. Find frequency of the letter 't'
answer:
4


question:
Sentence: 'a small gray elephant walking across a bridge'. Find frequency of the letter 'w'
answer:

1