There is no such designation. Instead, the convention is:
Paroxysmal AF - it comes and goes on its own and never lasts more than a full week.....!
Persistent - It may come and go, but it does much more often and may last more than a full week;
Long-standing persistent - just what you'd think it means....you've largely been in AF, with breaks here and there, for a year or more; and
Permanent - same thing....what you'd imagine it means.