It is not the number of rounds you fire. It is the quality of the shots.
I have seen many shooters who fire thousands of rounds each year. Despite the expense and the wear and tear on their equipment they do not improve.
My most effective training, included 10 dry fires to 1 round fired, meditation on my shooting, Archery practice. and weight lifting.
Once i did not fire a shot handgun for 6 months. I thought about it, I visualized shooting, and I practiced with my hand (no pistol). When I returned to the range, I improved my bulleyes score by an average of 10 points.