instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a white toilet sitting next to a bathroom sink'. Find frequency of the letter 'b'
answer:
1


question:
Sentence: 'a birthday cake with a number one and three candle'. Find frequency of the letter 'w'
answer:
1


question:
Sentence: 'several statues of elephants with different colors and designs painted on them, all in a row on the grass'. Find frequency of the letter 'r'
answer:

5