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

Sentence: 'a blue bowl holding mashed bananas and oatmeal with a bottle of sugar and cinnamon sitting beside it'. Find frequency of the letter 'g'
3

Sentence: 'a man in a sweatshirt is taking his own picture'. Find frequency of the letter 'u'
1

Sentence: 'a woman sitting in front of a cake with a sparkler in it'. Find frequency of the letter 'n'

5