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

Q: Sentence: 'a cat sprawls out and sleeps on its back on a lounge chair with an acorn theme'. Find frequency of the letter 'r'

A: 3
****
Q: Sentence: 'a man hitting a tennis ball with a tennis racquet'. Find frequency of the letter 't'

A: 6
****
Q: Sentence: 'a male in a black shirt and a boy eating'. Find frequency of the letter 'n'

A:
3
****