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

Example Input: Sentence: 'a group of men in front of a table of green bananas while a man in the blue plaid shirt holds his hand out as if to hold on to something'. Count the occurrences of the word 'in' in the given sentence.
Example Output: 2

Example Input: Sentence: 'there are some chairs under an umbrella at the beach'. Count the occurrences of the word 'at' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a group of people are sitting in the back of a truck'. Count the occurrences of the word 'of' in the given sentence.
Example Output:
2

