A few months. As for doing it, select the NPCs from the Party screen, then choose the patrol option from the drop down menu and setup the patrol.
“Before you ask why they have them then, a) its because the NPCs needed a skill set similar to a 1st level PC to avoid the whole 30+ free skill points to turn them into unseeable, forces of nature in combat, and b) to add some RP flavour to them.
“That's what I mean. NPC's start with more skill points than a PC, and don't have to put anything in skills such as leadership or piloting. Especially military npc's but also non military ones, now have the ability to be super soldiers. Unfortunately, PC's won't stand a chance come combat in that sort of environment.
“They already removed those skill points again for combat NPCs, presumably they'll do the same with the other types at some point. ”Umm, no they didn't