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

Sentence: 'a jumbo jet airplane carrying a space shuttle in the air'. Count the occurrences of the word 'a' in the given sentence.
2

Sentence: 'hotdogs and buns grilling on a charcoal grill'. Count the occurrences of the word 'grilling' in the given sentence.
1

Sentence: 'a man on a laptop with wine glasses and some dolls on the desk'. Count the occurrences of the word 'on' in the given sentence.

2