TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a doorway looking into a small bathroom with white toilet'. Find frequency of the letter 'r'

SOLUTION: 2

PROBLEM: Sentence: 'the bathroom is in need of remodel'. Find frequency of the letter 'e'

SOLUTION: 5

PROBLEM: Sentence: 'women on stools watch and feed the horses'. Find frequency of the letter 'c'

SOLUTION:
1