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

Ex Input:
Sentence: 'a big rig is driving through a construction site'. Count the occurrences of the word 'big' in the given sentence.

Ex Output:
1

Ex Input:
Sentence: 'a group of cows standing next to each other'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
1

Ex Input:
Sentence: 'kids in the snow getting ready to snowboard off a lift'. Count the occurrences of the word 'lift' in the given sentence.

Ex Output:
1