Technically rapid cycling is having 4 or more episodes per year. Ultra Rapid would be within days, and Ultra Ultra Rapid or Ultradian would be within the day. This is something that Pdocs do not educate us enough on I believe, also ultra and ultradian are considered rare, but from what I see even just here on PC, it's way more common then they say. My personal opinion, which is obviously not medically educated is that this might often be (but not always) a direct cause of medication. But that's just my personal opinion.