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

Input: Consider Input: Sentence: 'a big shaggy dog is tied up with its leash next to some stairs outside of a building'. Count the occurrences of the word 'shaggy' in the given sentence.

Output: 1

Input: Consider Input: Sentence: 'a jumbo jet airplane carrying a space shuttle in the air'. Count the occurrences of the word 'a' in the given sentence.

Output: 2

Input: Consider Input: Sentence: 'the tiled bathroom floor is white and dirty'. Count the occurrences of the word 'the' in the given sentence.
Output: 1