Oh, I don't care how random it is. My interest is when is it random. Do you only shuffle the deck when "shuffle" is performed, and then the shuffled order is pr

Oh, I don't care how random it is. My interest is when is it random. Do you only shuffle the deck when "shuffle" is performed, and then the shuffled order is preserved until: cards are (re-)moved; deck is shuffled again; etc? (I.e "real world" model). Or do you shuffle the remaining hidden deck multiple times (so, not when shuffle is explicitly performed, but on other occasions, for example; at intervals; or, after someone pics the top card; etc)?