For most I got between 65-85 wearings from a pair of shorts before they started coming apart. I usually bought low-end or mid-range from Wiggle's house brand dhb. My kits were usually between $80-$125, shorts price usually $40-$80. Average wearing would be 2 hours/30 miles. But sometimes as short as 30 minutes or as long as 9 hours.

My only really nice pair of shorts from Voler lasted about 150 wearings. I really liked them but I've since abandoned wearing cycling kit and just ride in wool shorts and a t-shirt. Saving money and lookin' fredly