TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'the child is waving a small flag as she stands near two women'. Find frequency of the letter 'g'

SOLUTION: 2

PROBLEM: Sentence: 'two men with colorful ties are posing for a picture'. Find frequency of the letter 'r'

SOLUTION: 4

PROBLEM: Sentence: 'an orange slice laying next to apple on grey table'. Find frequency of the letter 'y'

SOLUTION:
2