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

Ex Input:
Sentence: 'a man tossing a frisbee to another man to catch'. Count the occurrences of the word 'to' in the given sentence.

Ex Output:
2

Ex Input:
Sentence: 'the man with many graphic novels on a display table is on a cell phone'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2

Ex Input:
Sentence: 'a man or woman holding a pair of big orange scissors'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2