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

Example Input: Sentence: 'blue flowers with green stems next to white flowers in a vase'. Count the occurrences of the word 'flowers' in the given sentence.
Example Output: 2

Example Input: Sentence: 'a cyclist travels down a leaf strewn path in a park'. Count the occurrences of the word 'a' in the given sentence.
Example Output: 3

Example Input: Sentence: 'a lot of bananas and a person together'. Count the occurrences of the word 'a' in the given sentence.
Example Output:
2

