In this task, you need to count the occurrences of the given word in the given sentence.

Sentence: 'an employee at a canon store stands in front of a case of canon merchandise'. Count the occurrences of the word 'of' in the given sentence.
2

Sentence: 'black and white photograph of a park bench in woods'. Count the occurrences of the word 'white' in the given sentence.
1

Sentence: 'a little girl holds a tooth brush while her mother stands in the background in a bathroom'. Count the occurrences of the word 'a' in the given sentence.
3