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

Ex Input:
Sentence: 'a young boy in a green baseball uniform holding a baseball bat'. Count the occurrences of the word 'baseball' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a small train engine pulling a freight car'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a kitchen with a white refrigerator and a microwave oven'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3