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

Sentence: 'this is a dog sitting on a reclining chary with a pillow'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'a couple of elephants out in the field having a snack'. Count the occurrences of the word 'a' in the given sentence.
2

Sentence: 'a man eats food at a bench in front of a boat'. Count the occurrences of the word 'a' in the given sentence.

3