instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a yellow fire hydrant in the forefront of a roadway'. Find frequency of the letter 'r'
answer:
5


question:
Sentence: 'young girl playing with refrigerator magnet while kneeling on floor'. Find frequency of the letter 'n'
answer:
6


question:
Sentence: 'a chocolate cake with icing next to plates and spoons'. Find frequency of the letter 'x'
answer:

1