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

Sentence: 'a young boy holding a piece of paper on top of a table'. Find frequency of the letter 'y'
2

Sentence: 'a bird is perched on a container in a person's hand'. Find frequency of the letter 'c'
2

Sentence: 'a white and blue plate topped with meat and a salad'. Find frequency of the letter 'u'

1