instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a bird is standing on the ledge of the building'. Find frequency of the letter 't'
answer:
3


question:
Sentence: 'a cooked pizza on a silver platter with another in the background'. Find frequency of the letter 'e'
answer:
5


question:
Sentence: 'a helicopter flying with two people in parachutes landing'. Find frequency of the letter 'o'
answer:

3