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

Example Input: Sentence: 'a small grey bird eating food from paper plates on a picnic table'. Count the occurrences of the word 'small' in the given sentence.
Example Output: 1

Example Input: Sentence: 'one man playing the wii by his lonesome'. Count the occurrences of the word 'by' in the given sentence.
Example Output: 1

Example Input: Sentence: 'a woman on a pair of skis smiling'. Count the occurrences of the word 'smiling' in the given sentence.
Example Output:
1