When was Hindustan first used?

The term Hindustan was first used by the ancient Persians to refer to the region of the Indus Valley. Over time, it came to be used more broadly to describe the Indian subcontinent. The term gained prominence in the medieval period, especially during the rule of the Delhi Sultanate and the Mughal Empire, to refer to the northern parts of India. In modern usage, Hindustan is often used synonymously with India, although its historical references were more region-specific. The term reflects both geographical and cultural aspects of the land and its people.

This question related to Chapter 5 Social Science Class 6th NCERT.
From the Chapter 5. India, That Is Bharat.
Give answer according to your understanding.