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

Q: Sentence: 'a group of three dogs laying on a kitchen floor'. Find frequency of the letter 'r'

A: 3
****
Q: Sentence: 'group of cars on the road with the sun setting behind it'. Find frequency of the letter 'd'

A: 2
****
Q: Sentence: 'a woman is using a video game remote control'. Find frequency of the letter 'e'

A:
4
****