2003-2005 - Every 2-3 weeks
2005-2007 - Maybe 2-4 times each year in my stock Samurai (was building my cab truck, and working 6 days/week)
2008-2010 - 8-10 times each year
2011-2015 - 6 times each year
2016- present - 2 times total? My last wheeling trip was May of 2016 at the Flats, then I took my Samurai apart in June/July
I bought a stock YJ a couple of months ago hoping to get back out on the trail this fall, but it developed a fuel line leak, and the rear pinion bearings were shot, so that isn't going to happen. I'm probably looking at late 2019 at best (most likely early 2020) before I get the YJ built and back on the trails.
As others have said, with a wife, kid, family members near by, and house, spare time to go wheeling and work on stuff is hard to come by.