I've been a zen student for maybe 12 years now, my meditation practice is not 100% consistent, but conservatively I average 30 minutes a day, which wolfram alpha tells me is a little more than 2000 hours. Pretty far from Olympic level. A few years ago I borrowed a muse (a low cost eeg that connects to your phone to help "train" your meditation) from somebody and played around doing direct captures to make spectrograms. I was curious about if I could actually see any correlation between what I subjectively considered samadhi and the spectrograms. Didn't see anything. Granted the muse only has 4 contacts and the guy in the picture has many more. Anyway I did the math and to get to 62000 I think it's more like 12 hours a day for the next 12 years..