There are 300 centuries in 30 millennia.
2000/100 = 20 centuries
5000000
1 millennia =1000 year 9 millennia =9000 yrs
6
There are 31285 weeks and 5 days in 6 centuries
6 Test centuries.
Nanoseconds (or smaller), seconds, minutes, hours, days, weeks, months, years, decades, centuries, millennia. Take your pick.
There are 100
1 millennium = 1,000 years so 3 millennia = 3,000 years. Simple!
1 millennium = 1000 years 2 millennia = 2000 years
900