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

Sentence: 'three woman are having a discussion in the kitchen'. Find frequency of the letter 'n'
5

Sentence: 'people seated on a table looking very happy'. Find frequency of the letter 'g'
1

Sentence: 'a bathroom with all tiles fallen off the walls'. Find frequency of the letter 'h'

3