See CLDR

I believe, there is a great overlap between this approach to time expressinos and CLDR time and calendar data. I'll try to find a place where CLDR stuff is documented, but knowing that their publicly available documentations usually are between sparse and hardly organized, while parts are buried in the survey tool and thus semi-private, this may take time. --Purodha Blissenbach 16:15, 9 March 2011 (UTC)

Do you mean this: http://unicode.org/cldr/apps/survey?_=en&x=units

Look even more restricted than my proposal.