Answer

In the commonly told Jain life-story, Chandraprabhu Swami is described through 3 main bhavs:

1. King Padma
2. A deity in Vaijyant heaven
3. His final human birth as Chandraprabhu Swami. ( jainqq.org)

Explanation

Some Jain sources present only these two previous births plus the final Tirthankar birth, so in that common narration, the answer is 3 bhavs. ( jainqq.org)

Spiritual Understanding

This shows how a soul progresses through meritorious births, spiritual effort, and finally attains the Tirthankar state. ( dadabhagwan.org)

Takeaway

So, the simple answer is: Chandraprabhu Swami is commonly said to have had 3 main bhavs. ( jainqq.org)