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

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

A: 5
****
Q: Sentence: 'a girl that has a kite in the air'. Find frequency of the letter 'r'

A: 2
****
Q: Sentence: 'a man siting down on the snow with his feet on a snowboard'. Find frequency of the letter 't'

A:
4
****