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

Ex Input:
Sentence: 'a large building with a cross at the very top and a clock below it'. Count the occurrences of the word 'cross' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a bathroom with a toilet and a bath tub'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a couple of men sitting on top of a bench holding items'. Count the occurrences of the word 'of' in the given sentence.

Ex Output:

2