TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'eight donuts are cooked together in oil in a metal tray'. Find frequency of the letter 'h'

SOLUTION: 2

PROBLEM: Sentence: 'a grey hummingbird by fence and tree branches'. Find frequency of the letter 'y'

SOLUTION: 2

PROBLEM: Sentence: 'new pieces of black luggage are on a shelf'. Find frequency of the letter 'k'

SOLUTION:
1