章
章 – Zhang1 – Chapter, Section, Seal, Stamp
What’s this I’ve found now?
One 章 = 19 years.
Four 章 = One 歲, or 76 years.
Twenty 歲 = One 遂, or 1,520 years.
Three 遂 = One 歲, or 4,560 years.
Seven 歲 = One 極, or 31,920 years.
AND THEN TIME REPEATS FROM THE BEGINNING. At least according to this page.