instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'there is an old stove with old pots on the burners'. Find frequency of the letter 't'
answer:
5


question:
Sentence: 'a  woman standing next to a man on a motorcycle in front of a market'. Find frequency of the letter 'l'
answer:
1


question:
Sentence: 'a little boy trying to open a fire hydrant'. Find frequency of the letter 'o'
answer:

3