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

Ex Input:
Sentence: 'a group of guys playing a game of frisbee'. Count the occurrences of the word 'of' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a person on a sandy beach throwing a frisbee'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man putting melted cheese on food in foil in a food truck'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2