In this task, you need to count the number of times the given letter appears in the given sentence.

Sentence: 'there is a stop sign that has a reflection in a puddle'. Find frequency of the letter 'e'
5

Sentence: 'bathroom scene with a black cat going behind the door'. Find frequency of the letter 'e'
4

Sentence: 'a man riding a skateboard up the side of a ramp'. Find frequency of the letter 'a'

7