The apprentice period in Sheffield was something like 7 years before one was considered fit for the trade. That was long ago, and hours and output was much greater, so it would probably close to something like 10 years of work in this modern world.
I'm sure the Japanese and others have similar standards.
The closest in the States is probably the "Smith" ratings as mentioned by Danke. I haven't seen them listed, but the gap between starting, and Mastersmith probably is probably 10-15 years work for most. There is even talk sometimes of perhaps adding a "Grandmaster" level, but that hasn't happened.