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

Example Input: Sentence: 'a cat laying on a blanket by two wii remotes'. Count the occurrences of the word 'laying' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a white toilet sitting under a window next to a bath tub'. Count the occurrences of the word 'white' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a chair in a corner next to a lampwith pictures behind it on a wall'. Count the occurrences of the word 'a' in the given sentence.
Example Output:
4