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

Input: Consider Input: Sentence: 'a bed is decorated with a yellow and white patchwork quilt and a stuffed owl'. Count the occurrences of the word 'and' in the given sentence.

Output: 2

Input: Consider Input: Sentence: 'a boy holding onto a wii mote by a fireplace'. Count the occurrences of the word 'a' in the given sentence.

Output: 3

Input: Consider Input: Sentence: 'an older man in a wheelchair is sitting on a sidewalk'. Count the occurrences of the word 'a' in the given sentence.
Output: 2