In Niven's The Integral Trees and The Smoke Ring, how long have the humans been living there since the colony was founded? Clearly, long enough for villages to form and different tribes to develop. But is this thousands of years, just a couple generations, or what?
“Sharls would not enter that inner region. The maelstrom of forces could damage his ship. He couldn't guess how long the seeder ramship must survive to accomplish his mission. He had waited more than half a thousand years already.”
“The crew must have disconnected the autopilot system on every one of the CARMs, half a thousand years ago.”
“Oh ho! The video link hadn't been disconnected! A block must have been programmed in, half a thousand years ago, by the mutineers. Certainly their descendants wouldn't know how to do that.”
Excerpts From: Larry Niven's The Integral Trees
More than 500 years.