50,000? Interesting.
Of course I imagine that they vary considerably in complexity and suitability. So,with 50,000 I think it reasonable to expect for my 'rating'/strength category, there are unlikely to be more than say, 10,000 of those that would be reasonably but not impossibly challenging for me.
So I still conclude that a pace of say, 3/day seems about right (stretching them out to almost ten years' worth).
sftac
They constantly add more from games here on the site. You can actually submit neat tactics from your own games for approval. At 3/day you would never see them all. Not even close. I do anywhere from 20-200 a day, and some days I see no repeats.
The top graph is your daily attempts. The blue means successful, and red mean failed. So the full red bar means you missed all 3 that day. The bottom graph is your actual rating. And the colors signify how well you are doing. Red means you dropped that many points since the day before, while blue means you improved over the score you logged off with the previous day.