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

Sentence: 'slices of orange are arranged on a plate'. Find frequency of the letter 's'
2

Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'
1

Sentence: 'several cows standing on the road and grass beside it'. Find frequency of the letter 'e'

5