instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'an audience watches as a bird spreads its wings'. Find frequency of the letter 'd'
answer:
3


question:
Sentence: 'there is a stop sign that has a reflection in a puddle'. Find frequency of the letter 'e'
answer:
5


question:
Sentence: 'a cat siting on the ground watching a tv'. Find frequency of the letter 'u'
answer:

1