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!
Four score and six years is equal to 86 years. It is a historical way of expressing a time period in terms of 20-year increments.
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.