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

Ex Input:
Sentence: 'a small pizza being cut with a pizza cutter'. Count the occurrences of the word 'pizza' in the given sentence.

Ex Output:
2

Ex Input:
Sentence: 'a home computer setup with two laptops on a desk'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2

Ex Input:
Sentence: 'a close up of a plate of sliced pizza on a table'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3