In this task, you need to count the number of times the given letter appears in the given sentence.
--------
Question: Sentence: 'a couple of people that are on a baseball field'. Find frequency of the letter 'c'

Answer: 1


Question: Sentence: 'two people holding their skies in a snowy resort'. Find frequency of the letter 'n'

Answer: 3


Question: Sentence: 'a toaster oven filled with lots of food'. Find frequency of the letter 'i'

Answer:
2