TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a doll with huge eyes and black hair with blunt bangs holds a red umbrella'. Find frequency of the letter 'e'

SOLUTION: 5

PROBLEM: Sentence: 'this is a sign in front of a large cathedral'. Find frequency of the letter 'a'

SOLUTION: 5

PROBLEM: Sentence: 'an african american man plays on a tennis court'. Find frequency of the letter 'e'

SOLUTION:
2