TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a fluffy white car looking in a mirror'. Find frequency of the letter 'k'

SOLUTION: 1

PROBLEM: Sentence: 'a bus with two floors belonging to london country'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a group of zebras are frolicking in the field'. Find frequency of the letter 'i'

SOLUTION:
4