TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a closeup view of a bathroom sink, that is very modern'. Find frequency of the letter 'e'

SOLUTION: 4

PROBLEM: Sentence: 'a red stop sign with street signs above it'. Find frequency of the letter 't'

SOLUTION: 5

PROBLEM: Sentence: 'a beach filled with kites and wind sails next to the ocean'. Find frequency of the letter 'e'

SOLUTION:
6