instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a red fire hydrant opened and spilling water'. Find frequency of the letter 'd'
answer:
4


question:
Sentence: 'a person trying to flip a skateboard in a garage'. Find frequency of the letter 'a'
answer:
7


question:
Sentence: 'in daylight hours, a dog looks outside through a window'. Find frequency of the letter 'h'
answer:

4