TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a girl that has a kite in the air'. Find frequency of the letter 'r'

SOLUTION: 2

PROBLEM: Sentence: 'a dog on a couch near many pillows'. Find frequency of the letter 'p'

SOLUTION: 1

PROBLEM: Sentence: 'a man sneers while wearing a dark suit and tie'. Find frequency of the letter 'h'

SOLUTION:
1