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

Sentence: 'a woman holds a wine glass upside down while wearing rabbit ears and staring at a bottle of wine'. Find frequency of the letter 'a'
11

Sentence: 'a plastic plastic plate topped with three different type of food'. Find frequency of the letter 'l'
3

Sentence: 'the woman is walking in the snow wearing skis and a ski pole'. Find frequency of the letter 'w'

4

