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

Example Input: Sentence: 'a slice of pizza that is sitting on a plate on a table'. Count the occurrences of the word 'slice' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a child in a blue helmet standing on a skateboard indoors'. Count the occurrences of the word 'a' in the given sentence.
Example Output: 3

Example Input: Sentence: 'shiny restored vintage truck parked in a field at a vehicle event'. Count the occurrences of the word 'shiny' in the given sentence.
Example Output:
1