In this task, you need to count the number of times the given letter appears in the given sentence.

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

A: 1
****
Q: Sentence: 'a table topped with a cupcake on a picture of a cupcake'. Find frequency of the letter 'o'

A: 3
****
Q: Sentence: 'a couple of elephants hanging around near water'. Find frequency of the letter 'e'

A:
5
****