Quote Originally Posted by Nikpalj
What I wanted was a quick reminder: how often do I have to shuffle the garrisoned troops and/or the generals I've given provincial titles to, in order for them to not acquire vices? Once every ten years if my memory serves me?
That's about right, although I can't say with certainty that that's the exact interval. I sometimes move my governors around as little as every 5 years, although I concede it's probably unnecessary to do so quite *that* often.

Quote Originally Posted by Nikpalj
And is it enough to simply pick them up (out of the fort) and then simply put them back inside, or do I actually have to move them into another province? I think that I remember sending them around into one of the bordering provinces, then back on the next turn.
You need to actually move them to another province for at least one turn. It's getting the governors away from home and into the fresh air that helps keep the sloth, greed, and gluttony at bay.

Quote Originally Posted by Dues ret.
I didn't know that obtaining vices was tied to the movement of the respective units in MTW too. for sure it's the case with RTW, but this is an interesting insight
Yeah, moving your governors around in MTW does help prevent them from getting the various unfavorable traits in the later game. (A word to the wise, by the way: This method is *not* foolproof, although it helps. Your governors are still likely to pick up vices, just not as often.)