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

Sentence: 'an elephant has taken a man's hat in its trunk'. Find frequency of the letter 'p'
1

Sentence: 'a man opening up a package sitting on a couch'. Find frequency of the letter 'n'
5

Sentence: 'several people in a group are having a good time while two cakes are ready to be sliced'. Find frequency of the letter 'h'

2