instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a woman holds some baked goods at the convention'. Find frequency of the letter 'd'
answer:
3


question:
Sentence: 'a pizza is in a box on a table outside'. Find frequency of the letter 'u'
answer:
1


question:
Sentence: 'a white plate filled with chop sticks,a banana and sushi'. Find frequency of the letter 'd'
answer:

2