TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a bed with a mattress that has nothing on it'. Find frequency of the letter 'a'

SOLUTION: 5

PROBLEM: Sentence: 'a baby elephant walks beside an adult elephant along a post and cable'. Find frequency of the letter 'l'

SOLUTION: 6

PROBLEM: Sentence: 'blurry picture of a banana and palm tree'. Find frequency of the letter 't'

SOLUTION:
2