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

Sentence: 'a white bowl filled with peeled orange slices'. Find frequency of the letter 's'
2

Sentence: 'food sitting in bowls on table with checked tablecloth'. Find frequency of the letter 't'
6

Sentence: 'a bowl of rice with chicken and broccoli'. Find frequency of the letter 'n'

2

