TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a black cat laying down on a bed'. Find frequency of the letter 'y'

SOLUTION: 1

PROBLEM: Sentence: 'a dog has found a rather large stick for playing fetch'. Find frequency of the letter 't'

SOLUTION: 3

PROBLEM: Sentence: 'a zebra walking away from the camera in a dirt and grassy area'. Find frequency of the letter 'a'

SOLUTION:
12