Re: Usual???
On the Ubuntu systems that I see it is exactly what Fol says: apache rotates logs daily, and logrotate runs off cron.daily which is run at 6:25 (/etc/crontab).
On Fedora the rotation is more complex (logrotate runs from anacrontab that has random delay, etc.). Logrotate configuration does not specify daily, but logrotate does run daily.