TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a pizza is in a box on a table outside'. Find frequency of the letter 'u'

SOLUTION: 1

PROBLEM: Sentence: 'a kitchen with hanging lights, an island with sink and bar stools, a refrigerator, small pantry door, wooden cabinets and shiny wood floor'. Find frequency of the letter 'n'

SOLUTION: 12

PROBLEM: Sentence: 'a person standing across the road near a fence'. Find frequency of the letter 'e'

SOLUTION:
5