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

Example Input: Sentence: 'a black counter top of a stove inside a kitchen'. Count the occurrences of the word 'a' in the given sentence.
Example Output: 3

Example Input: Sentence: 'a row of red and blue trucks parked in a parking lot'. Count the occurrences of the word 'a' in the given sentence.
Example Output: 2

Example Input: Sentence: 'a couple of students sitting at a table finishing there lunches'. Count the occurrences of the word 'there' in the given sentence.
Example Output:
1