TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'the little girl is flying her kite in the field'. Find frequency of the letter 'i'

SOLUTION: 7

PROBLEM: Sentence: 'a couple of items that are on the wall'. Find frequency of the letter 'm'

SOLUTION: 1

PROBLEM: Sentence: 'two people in wet suits carrying their surf boards'. Find frequency of the letter 's'

SOLUTION:
4