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

Q: Sentence: 'a little dog on a table while a dog groomer cuts its fur'. Find frequency of the letter 'r'

A: 3
****
Q: Sentence: 'a woman in yellow dress standing next to a horse'. Find frequency of the letter 'l'

A: 2
****
Q: Sentence: 'a fruit stand with several apples, oranges and plums'. Find frequency of the letter 'a'

A:
6
****