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

Sentence: 'a baby elephant walks beside an adult elephant along a post and cable'. Find frequency of the letter 'l'
6

Sentence: 'a baseball player dropping his bat and starting to run'. Find frequency of the letter 'o'
2

Sentence: 'a bunch of different types of fruits at a market'. Find frequency of the letter 'y'

1