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

Input: Consider Input: Sentence: 'a man riding skis down a snow covered slope'. Count the occurrences of the word 'snow' in the given sentence.

Output: 1

Input: Consider Input: Sentence: 'a man and a dog standing on a dirt path in the woods'. Count the occurrences of the word 'a' in the given sentence.

Output: 3

Input: Consider Input: Sentence: 'one plate holds a slice of cheese pizza and another holds a slice of ham and pineapple pizza'. Count the occurrences of the word 'pizza' in the given sentence.
Output: 2