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

Example Input: Sentence: 'a vehicle applying brakes near a stop sign on a rainy day'. Count the occurrences of the word 'a' in the given sentence.
Example Output: 3

Example Input: Sentence: 'some people with a bunch of hot dogs on some big forks'. Count the occurrences of the word 'people' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a man on a skate board riding on the edge of a ramp'. Count the occurrences of the word 'a' in the given sentence.
Example Output:
3