definiens: shall mean that, during any ! tWelve ( 12 ) montN period during the Tenn ( which period shall be measured as set forth below ), ( i ) multiple instances of Inability to Supply have occurred and ( ii ) as a result of such instances of Inab§fY t~ Supply, the aggregate quantity of Product that Schwarz has supplied during such elv k12 ) month\ period, either on time or within the inet 90 da cure period applicable to any Inability to Supply, represents less than six ercent 60 % of the aggregate quantity of Product specified in Valid Purchase Orders submitted to Schwarz in accordance with this Agreement for shipment during such /tWelve ( 12 ) month perio~. The fuelve ( 12j fuont@ period applicable to any determination of whether a Failure to Supply has occurred shall commence upon the required delivery date specified in the Valid Purchase Order to which the first applicable instance of Inability to Supply relates