260 years equal two centuries and six decades.
SIX
600 years
Six.
446 years
Six hundred.
That's 560 years...
As a millennium contains ten centuries or a thousand years, sixty centuries fill six millenia of time. Just imagine what technology will be like in six millennia!
A score is equal to 20 years.
26...a score = twenty (as in "...four score & seven years ago..." means 87 years)
a "score" is 20 years so a six letter word for four score would be: Eighty
six centuries in a cohort.