It really depends on how hard you're pushing it. If you're driving hard enough to get a 4 wheel drift, or even just one end drifting (over/understeer) you will see significant wear with that limited track time, particularly on the outside shoulder of the tire.

Street tires last me about 3 days on the track. Track tires (R compounds) actually last me longer because they grip more/slide less, about 5-8 track days, depending on the track.

Greg