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

Q: Sentence: 'a parking meter painted green with a sign that describes it as not a parking meter'. Find frequency of the letter 's'

A: 4
****
Q: Sentence: 'a jet flying through the clear blue sky'. Find frequency of the letter 'g'

A: 2
****
Q: Sentence: 'a person rides a horse while another person looks on'. Find frequency of the letter 'i'

A:
2
****