Is there any audit retention period from Oracle and how to change it based on customer needs

We want to use Audit functionality within Oracle. For that we have enabled some Audit Attibutes using Manage Audit Policies within Setup and Maintenance.

We want to define our own retention periods of this Audit Data and on searching Oracle docs, it says there is no specified retention period on Audit Data. Follow your company policies for retaning or removing such data.

Where in system we can define our own Audit retention period so that after that period, the audit data is autodeleted?