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 standing next to some trees'. Find frequency of the letter 'f'

SOLUTION: 2

PROBLEM: Sentence: 'a bus is stopped in front of a graphic statue'. Find frequency of the letter 'e'

SOLUTION: 2

PROBLEM: Sentence: 'a couple od sheep are standing off in a field'. Find frequency of the letter 'e'

SOLUTION:
5