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

Ex Input:
Sentence: 'a reflection of a wild animal in a side view mirror'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3

Ex Input:
Sentence: 'a tv sitting on a patch of grass next to a pole'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3

Ex Input:
Sentence: 'two pictures are hanging on the wall of the bathroom'. Count the occurrences of the word 'the' in the given sentence.

Ex Output:
2