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

Ex Input:
Sentence: 'a cake with chocolate frosting and a cake with white frosting are each in an open box'. Count the occurrences of the word 'frosting' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a menu in the middle of a fast food returant'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a male in a tan shirt and a frisbee'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3