In this task, you need to count the number of times the given letter appears in the given sentence.
--------
Question: Sentence: 'oranges are sitting in a bowl on a table'. Find frequency of the letter 'a'

Answer: 5


Question: Sentence: 'a street scene looking at the back of the stop sign'. Find frequency of the letter 't'

Answer: 6


Question: Sentence: 'a mom and her daughter prepare to make dinner together'. Find frequency of the letter 'e'

Answer:
8