In this task, you need to count the number of times the given letter appears in the given sentence.
--------
Question: Sentence: 'some cubbies with towels in a blue bathroom'. Find frequency of the letter 'l'

Answer: 2


Question: Sentence: 'a half eaten doughnut in a persons hand'. Find frequency of the letter 'h'

Answer: 3


Question: Sentence: 'a person that is in some kind of boat'. Find frequency of the letter 'o'

Answer:
4