Just random numbers I am thinking.....
I think no one would argue that it would take the average person a year to learn how to shave well. 365 shaves.
If you are honing for yourself only that would mean you would hone on an average every 3 months over that time to be good.
365/4=91.5 years.
You would have to live a long life only honing your own to become an expert.

