instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a stop sign near a rail road crossing sign'. Find frequency of the letter 'g'
answer:
3


question:
Sentence: 'a woman in a tank top reaches out for a frisbee'. Find frequency of the letter 'a'
answer:
6


question:
Sentence: 'a large group of ripe bananas in a wicker basket'. Find frequency of the letter 'e'
answer:

4