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

Ex Input:
Sentence: 'a stuffed animal sitting on a chair in front of a laptop'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3

Ex Input:
Sentence: 'a baseball player rubs the sweat off his face while walking down the field'. Count the occurrences of the word 'the' in the given sentence.

Ex Output:
2

Ex Input:
Sentence: 'some people some snow and some trees and one person is taking a picture'. Count the occurrences of the word 'some' in the given sentence.

Ex Output:
3