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

Ex Input:
Sentence: 'a brown dog sitting in front of a tv in a room'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'several sheet grazing on greens near some mountains'. Count the occurrences of the word 'mountains' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'extreme closeup of meet and cheese pizza and cutting wheel'. Count the occurrences of the word 'and' in the given sentence.

Ex Output:

2