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

Example Input: Sentence: 'a black and white photo of an airplane being loaded'. Count the occurrences of the word 'of' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a desktop computers sitting on a desk next to a laptop'. Count the occurrences of the word 'a' in the given sentence.
Example Output: 3

Example Input: Sentence: 'glassware and oranges arranged on a tan table'. Count the occurrences of the word 'and' in the given sentence.
Example Output:
1