TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'oranges are sitting in a bowl on a table'. Find frequency of the letter 'a'

SOLUTION: 5

PROBLEM: Sentence: 'a close up of a bird on the outside window sill'. Find frequency of the letter 'c'

SOLUTION: 1

PROBLEM: Sentence: 'a beach with groups of people under colorful umbrellas'. Find frequency of the letter 's'

SOLUTION:
2