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

Q: Sentence: 'oranges are sitting in a bowl on a table'. Find frequency of the letter 'a'

A: 5
****
Q: Sentence: 'a sailboat is floating near the rocky shore of a beach'. Find frequency of the letter 'o'

A: 5
****
Q: Sentence: 'several people waiting to get on the train at a public transportation area'. Find frequency of the letter 'a'

A:
9
****