In this task, you need to count the number of times the given letter appears in the given sentence.
--------
Question: Sentence: 'a man flying through the air on top of a skateboard'. Find frequency of the letter 'h'

Answer: 3


Question: Sentence: 'a batter, catcher and umpire waiting for the pitch and a major league baseball game'. Find frequency of the letter 'c'

Answer: 3


Question: Sentence: 'a building with a large clock on the front'. Find frequency of the letter 'e'

Answer:
2