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

Example Input: Sentence: 'a white plate with rice and vegetables with wooden chop sticks'. Count the occurrences of the word 'chop' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a young smiling couple at a wedding cut a cake'. Count the occurrences of the word 'a' in the given sentence.
Example Output: 3

Example Input: Sentence: 'a black and white clock on a chain'. Count the occurrences of the word 'a' in the given sentence.
Example Output:
2