TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'young boy flying kite in large field at outdoor event'. Find frequency of the letter 'y'

SOLUTION: 3

PROBLEM: Sentence: 'three woman are having a discussion in the kitchen'. Find frequency of the letter 'n'

SOLUTION: 5

PROBLEM: Sentence: 'a man with dreadlocks standing in a kitchen'. Find frequency of the letter 'w'

SOLUTION:
1