TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a picture of a toilet and toilet paper in a bathroom'. Find frequency of the letter 'o'

SOLUTION: 5

PROBLEM: Sentence: 'a bathroom that has it's lights turned on'. Find frequency of the letter 'h'

SOLUTION: 4

PROBLEM: Sentence: 'large modern bathroom with jacuzzi in a house'. Find frequency of the letter 'o'

SOLUTION:
4