TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a little boy standing near a couch and a table'. Find frequency of the letter 'i'

SOLUTION: 2

PROBLEM: Sentence: 'a street at night with trees and streetlights on'. Find frequency of the letter 't'

SOLUTION: 9

PROBLEM: Sentence: 'several people standing around a large parked truck'. Find frequency of the letter 'p'

SOLUTION:
3