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

Ex Input:
Sentence: 'a hot dog that is sitting on a plate'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2

Ex Input:
Sentence: 'a woman sitting at a table holding a hot dog up to her mouth'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3

Ex Input:
Sentence: 'a woman standing on the back end of a boat on a body of water'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3