instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'two elephants walking on cement next to wall'. Find frequency of the letter 'n'
answer:
5

question:
Sentence: 'a microwave oven with a yellow note on the door'. Find frequency of the letter 'w'
answer:
3

question:
Sentence: 'a group of actors are made up like zombies'. Find frequency of the letter 'm'
answer:
2