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

Q: Sentence: 'a group of cows that are standing in the grass'. Find frequency of the letter 'g'

A: 3
****
Q: Sentence: 'a group of three dogs laying on a kitchen floor'. Find frequency of the letter 'r'

A: 3
****
Q: Sentence: 'some baseball players are playing baseball on a field'. Find frequency of the letter 'l'

A:
7
****
