TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a number of small boats on a beach near an umbrella'. Find frequency of the letter 's'

SOLUTION: 2

PROBLEM: Sentence: 'a tower with some bright lights and clocks on it'. Find frequency of the letter 'h'

SOLUTION: 3

PROBLEM: Sentence: 'a man climbing a ladder on to an airplane in flight from a motorcycle'. Find frequency of the letter 'b'

SOLUTION:
1