TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a downhill skier with snow plumes behind them'. Find frequency of the letter 'i'

SOLUTION: 4

PROBLEM: Sentence: 'a woman is taking a sip of a drink from a glass'. Find frequency of the letter 'i'

SOLUTION: 4

PROBLEM: Sentence: 'a dinner dish served with broccoli and sesame seed bread sticks'. Find frequency of the letter 'n'

SOLUTION:
3