instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a group of people standing around a table filled with assorted electronic devices'. Find frequency of the letter 'w'
answer:
1


question:
Sentence: 'a bird on a tree is flapping its wings'. Find frequency of the letter 'o'
answer:
1


question:
Sentence: 'a boy on a yellow surf board on the water'. Find frequency of the letter 'r'
answer:

3