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

Example Input: Sentence: 'a very large cow that is in a field'. Count the occurrences of the word 'large' in the given sentence.
Example Output: 1

Example Input: Sentence: 'two giraffes standing facing each other in an animal park'. Count the occurrences of the word 'park' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a small silver statue of a horse sitting on a table'. Count the occurrences of the word 'a' in the given sentence.
Example Output:
3