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 riding a camel in front of a truck'. Find frequency of the letter 't'

SOLUTION: 2

PROBLEM: Sentence: 'a woman swinging a tennis racquet towards a tennis ball'. Find frequency of the letter 'e'

SOLUTION: 3

PROBLEM: Sentence: 'a cat standing in front of a mirror on top of a table'. Find frequency of the letter 'r'

SOLUTION:
4