While no year has 2 decades between years, perhaps you mean what years signal a decade has passed. Years ending by counts of 10, so...
So if you wanted to show 2 decades with the above decades, it would be written as:
No year can have 2 decades between it.
7 decades which is 70 years
1 year is greater then 350 days
1958
well a decade is 10 year so 2 decades will be 20 years
2 decades after 1620 is 1600 because 1 decade is 10 years so 2 decades must be 20 so 1620 + 20= 1640
If one year has 12 months, then a decade would have 120. And two decades would be the double of that, so 240
1913 - 120 = 1793
A decade is 10 years. Since there are 20 years from 1942 to 1962, that would be 2 decades.
21 decades after 2017 will be 2227.
1793, as it was 120 years before 1913.
The main one was in 1845-1851 but it continued for decades afterwards
There are 12 decades in a 120 year period.