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: 'city two way street with cars lined up on both sides'. Find frequency of the letter 'h'
2

Sentence: 'the motorcycle is next to a wood sign'. Find frequency of the letter 'm'

1