For the CE release, I deleted the Git history (it became too difficult to deal with branch rewrites trying to remove all the cruft and deployment secret keys etc).
But the actual current working repo for the non-free version has ~ 2400 commits[0]. And the repo that I forked that from (~ 7 months ago), I'd closed 238 issues, and the repo I forked that project from I closed 200 issues. Those previous repos are all my work built from the ground up within this last ~12 months as well. The current working repo has closed 124 issues.
My Gitlab contribs for the last year are at: https://gitlab.com/dosycorp
And it's actually a little bit over 1 year, and if I count the Gitlab contribs show there, it's over 5500.
So, yeah it's been about 2000 hours I think. Working full time every week day and most weekends, and often longer than regular hours (but also dividing the work up in the day into sprints because that's how I manage myself to work best).
It's definitely been a year.