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

Ex Input:
Sentence: 'a woman and a cat are sitting at a laptop'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a white plate with rice and vegetables with wooden chop sticks'. Count the occurrences of the word 'chop' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man wears headphones so he can hear interpretation during a conference'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2