TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a person holding a wine glass in one hand and bread sticks in the other'. Find frequency of the letter 'd'

SOLUTION: 4

PROBLEM: Sentence: 'three woman are having a discussion in the kitchen'. Find frequency of the letter 'n'

SOLUTION: 5

PROBLEM: Sentence: 'a chocolate doughnut and a cell phone sit on this table'. Find frequency of the letter 'i'

SOLUTION:
2