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

Ex Input:
Sentence: 'an adult skier holds the hand of a child skier in the snow'. Count the occurrences of the word 'skier' in the given sentence.

Ex Output:
2

Ex Input:
Sentence: 'some people with a bunch of hot dogs on some big forks'. Count the occurrences of the word 'hot' in the given sentence.

Ex Output:
1

Ex Input:
Sentence: 'several sheet grazing on greens near some mountains'. Count the occurrences of the word 'mountains' in the given sentence.

Ex Output:
1