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: 'the wooden kitchen has a small child's plastic table in it'. Find frequency of the letter 'n'
3

Sentence: 'a pitcher winds up to throw a baseball at a batter'. Find frequency of the letter 'h'

2