TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'several zebras  and a giraffe in an enclosure'. Find frequency of the letter 's'

SOLUTION: 3

PROBLEM: Sentence: 'silhouette of person playing frisbee with moutain and sunset'. Find frequency of the letter 'i'

SOLUTION: 5

PROBLEM: Sentence: 'leafy vegetables are in an outdoors planter box'. Find frequency of the letter 'x'

SOLUTION:
1