>>/19021/
As far as I know at the flood detected error, one just have to wait it out. Length is random, but if one gets the flood detected warning twice in a row, it gets longer on the second time.
> nowhere on the site does it tell you
Much of functionality on whole lot of imageboards aren't really documented. The assumption is that users learn about the chan (any chan) by lurking and trial and error. Imageboards don't have handholding guidance culture.
It is okay to ask questions, and being curious about answers. We try to give those.