If one really counts, it has been at least several hundred thousand years.
Even if Milton Cheney didn't actively seek to acquaint himself with other demons, he wouldn't be completely unfamiliar with them.
During this time, Milton Cheney had already heard some news from no less than three demons.
The messages were roughly the same – that the war of order was likely to burst forth in the near future.
No news appears without cause, especially when the spread of such news wasn't deliberately hindered by that Level 8 demon from Order Seventeen.
It was almost as if the message was tacitly acknowledged.
If the news were true, then Milton Cheney's chances of continuing to lay low and grow were slim.
After all, if Order Seventeen truly erupts into large-scale warfare with other demonic orders, it wouldn't be a conflict that ends in a mere moment.
This war is unlike the Inter-realm Wars in the Wizard Realm.