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

Example Input: Sentence: 'a bed is decorated with a yellow and white patchwork quilt and a stuffed owl'. Count the occurrences of the word 'and' in the given sentence.
Example Output: 2

Example Input: Sentence: 'a skateboarder is skating down the street in front of a blue house'. Count the occurrences of the word 'front' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a child laying on a bed with his head hanging up side down and a teddy bear leaning against the bed'. Count the occurrences of the word 'a' in the given sentence.
Example Output:
3