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

Sentence: 'people plating cake in an office meeting room'. Find frequency of the letter 'g'
2

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

Sentence: 'a group of zebra standing together in field'. Find frequency of the letter 'u'

1