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

Example Input: Sentence: 'the young man is handling the door knob of the cabinet in the apartment'. Count the occurrences of the word 'the' in the given sentence.
Example Output: 4

Example Input: Sentence: 'a tea kettle that is sitting on a stove'. Count the occurrences of the word 'kettle' 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