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

Q: Sentence: 'a girl sits on a surfboard and smiles'. Find frequency of the letter 'i'

A: 3
****
Q: Sentence: 'a young boy holding a piece of paper on top of a table'. Find frequency of the letter 'y'

A: 2
****
Q: Sentence: 'a close up of two doughnuts on a plate'. Find frequency of the letter 'l'

A:
2
****