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

Input: Consider Input: Sentence: 'real to life dummy stuffed into a suitcase'. Count the occurrences of the word 'a' in the given sentence.

Output: 1

Input: Consider Input: Sentence: 'a woman sleeps in a bed with a pillow and sheet'. Count the occurrences of the word 'a' in the given sentence.

Output: 3

Input: Consider Input: Sentence: 'a man with a hand bag standing in a room'. Count the occurrences of the word 'a' in the given sentence.
Output: 3