TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a cat sprawls out and sleeps on its back on a lounge chair with an acorn theme'. Find frequency of the letter 'r'

SOLUTION: 3

PROBLEM: Sentence: 'a woman sitting in front of a giant slice of cheese pizza'. Find frequency of the letter 'e'

SOLUTION: 4

PROBLEM: Sentence: 'this bathroom has tan fixtures and wall paper'. Find frequency of the letter 't'

SOLUTION:
4