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

Q: Sentence: 'a man working on a small laptop on a wooden table'. Find frequency of the letter 'l'

A: 4
****
Q: Sentence: 'a dog on a couch near many pillows'. Find frequency of the letter 'p'

A: 1
****
Q: Sentence: 'a couple of sheep walking around in the grass'. Find frequency of the letter 'a'

A:
4
****