Recommended Waiting Period Before Deleting Hard Bounce Contacts

We are planning to automatically delete contacts that have hard bounced after sending a welcome email through Eloqua.

Could you please advise how long it typically takes for hard bounce information to be fully processed and reflected in Eloqua? Additionally, is there a recommended waiting period before deleting contacts to ensure that all hard bounce events have been captured and recorded?

We would appreciate any best practices or recommendations you can provide regarding this process.