TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a lady mixes some things in a blender as people look on'. Find frequency of the letter 'i'

SOLUTION: 3

PROBLEM: Sentence: 'some cubbies with towels in a blue bathroom'. Find frequency of the letter 'l'

SOLUTION: 2

PROBLEM: Sentence: 'there is a small piece of bright blue cake left on a plate with a knife'. Find frequency of the letter 'h'

SOLUTION:
3