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

Example Input: Sentence: 'a motorcycle rider on a red bike some dirt and a sign'. Count the occurrences of the word 'a' in the given sentence.
Example Output: 3

Example Input: Sentence: 'the soldier on horseback statue stands guard over the citys residences and buildings'. Count the occurrences of the word 'the' in the given sentence.
Example Output: 2

Example Input: Sentence: 'a kid in standing in the grass with kites flying above'. Count the occurrences of the word 'above' in the given sentence.
Example Output:
1