TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'two giraffes, one standing and one laying down'. Find frequency of the letter 'g'

SOLUTION: 3

PROBLEM: Sentence: 'a plate of food, with broccoli and nuts'. Find frequency of the letter 'b'

SOLUTION: 1

PROBLEM: Sentence: 'a group of people standing around a space rocket'. Find frequency of the letter 'o'

SOLUTION:
5