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

Ex Input:
Sentence: 'a person flying a kite on a busy city street'. Count the occurrences of the word 'on' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a boat carries a smaller motorboat that is hitched on the back'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'the sign says newbury road no through road worth'. Count the occurrences of the word 'the' in the given sentence.

Ex Output:

1