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

Input: Consider Input: Sentence: 'a group of people in a field flying kites on a clear day'. Count the occurrences of the word 'a' in the given sentence.

Output: 3

Input: Consider Input: Sentence: 'a bed is decorated with a yellow and white patchwork quilt and a stuffed owl'. Count the occurrences of the word 'and' in the given sentence.

Output: 2

Input: Consider Input: Sentence: 'two pizzas are covered with cheese and cucumber'. Count the occurrences of the word 'covered' in the given sentence.
Output: 1