TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'seagulls sit on the posts of a seaside balcony by a clock tower'. Find frequency of the letter 'g'

SOLUTION: 1

PROBLEM: Sentence: 'a small boat and a large boat on a river near a city'. Find frequency of the letter 'a'

SOLUTION: 10

PROBLEM: Sentence: 'man with a microphone interviewing a young woman standing in front of a red, white, and blue cake'. Find frequency of the letter 'e'

SOLUTION:
7