Well, you do hear humanity likened to a cancer fairly often. Look at what we do ...

stcredzero · on July 25, 2019

If cosmic things had millennial checkups, they'd be cosmic-scale in their hypochondria. That would be like me getting a checkup every second.

lioeters · on July 25, 2019

I wanted to find out the unit of time of "every billion years" - first thought was "billennial".

Apparently, a millenium is otherwise known as a kiloannum; a megaannum is a million years, and a gigaannum is a billion.

So, a reasonable universe should be getting gigaannual checkups.