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

Ex Input:
Sentence: 'some food is sitting on a stove top in a kitchen area'. Count the occurrences of the word 'is' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a double decker bus that is parked in front of a parking structure'. Count the occurrences of the word 'in' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a picture shows the backs of appliances in a whit walled room and a microwave next to a green bottle'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

4