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

[EX Q]: Sentence: 'a couple of horses standing on a  grass covered field'. Count the occurrences of the word 'on' in the given sentence.
[EX A]: 1

[EX Q]: Sentence: 'a lady that is at a sink in a kitchen'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a tattooed man holds up a shot with a drink in it'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
3