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

Ex Input:
Sentence: 'a wall has a plaque with a city and numbers on it'. Count the occurrences of the word 'numbers' in the given sentence.

Ex Output:
1

Ex Input:
Sentence: 'a truck that has pictures painted on it sitting in front of a store'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2

Ex Input:
Sentence: 'two pieces of luggage are sitting on the shelf'. Count the occurrences of the word 'two' in the given sentence.

Ex Output:
1