I forget how long it took me to amass 20,000 midi items. It's not a month though. The midi items were random drum patterns, 1 bar in length, in 4/4 time. They were generated by a drum sequencer. I used a mouse and keyboard macro recorder at about 20 times normal speed. Maybe it took 4 days, not including nights. I could have probably done it in 1 day if I used both of my computers night and day.
Hey, didn't it take you 7 years to make one album? That's pretty good speed from my POV because I haven't made one decent song, let alone one album.