TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a black cat laying down on a bed'. Find frequency of the letter 'y'

SOLUTION: 1

PROBLEM: Sentence: 'different sets of luggage in a baggage claim area'. Find frequency of the letter 'r'

SOLUTION: 2

PROBLEM: Sentence: 'bathroom with a shower, sink, and toilet in it'. Find frequency of the letter 'i'

SOLUTION:
5