You know, it's a funny thing.
I love to shoot. I always have. I grew up shooting, BB guns, Pellet Guns, 22s... then Competition in ROTC, and then the Military. After I left the Corps, I started shooting PPC. Practical Police Pistol, first local level matches where they only shot Match Five of the NRA Standard PPC course. 60 rounds, from 7 to 25 yards. When my mentor (A Police Sergeant) thought I was ready, he moved me up to the State level course... 150 rounds over a 50 yard course. Now, I was a department Firearms Instructor and taught Private Concealed Classes. I shot PPC three matches a month for about nine months. I also shot Glock Shooting Sports Matches. I'd shoot other invitational matches for fun. (Bowling pin/Falling Plates?)
Yes, "I" averaged about 10,000 rounds a year between practice, matches, and teaching classes where my instruction partner and I would shoot before and after the students arrived. I never suggested the average Officer or Concealed Weapons Student needed to shoot at that level to learn or maintain their skill levels.
I did, however, strongly suggest they shoot a box or two of ammunition a month for several months until they were comfortable, then at least a box of ammo every couple months to maintain skills. I also suggested continued education to increase knowledge and skills.
I continued to compete and push myself to insure my skills improved, and continued to learn so I could provide the best instruction possible for my LE and Civilian Students.
This is no different than the golf pro that I know that would hit at least two buckets of balls EVERY day without fail. He might chip them to the green, putt them, or drive them off the tee for distance, but he would hit a minimum of two buckets every single day. In addition, he would play at least one round of golf a day four or five times a week to maintain his high level of proficiency. He tried to play with someone as good or better than himself.
When I was shooting PPC, I tried to seek line assignments along side shooters better than I, so I could learn from them. The shooting community is a sharing community, and during down time most will pass along tips and tricks to help you improve. I always tried to coach new shooters if they were open to suggestions. Most wanted to improve and were glad to have the help.