20
20 years
It was when the general court of Connecticut formally received the Charter won from King Charles II of England by the diplomacy of Governor John Winthrop, Jr. 25 years later, with the succession of James II to the throne, Connecticut's troubles began. Sir Edmund Andros, his Majesty's agent, arrived in Hartford with an armed force to seize the Charter.
it ruined soil after just a few years
over 100 years of political conflict
More than 100 years of political conflict
20
decllenium
Copyright law has been in effect for hundreds of years in most countries.
Yes, I've have Charter for years and it has served me well.
The unit of a period is the second, because it is a time, and the SI unit for time is the second. Of course, you can also use other time units, such as microseconds, years, etc.
The effect of influenza virus was severe to the extent where average life span in US was depressed by a period of 10 years.
The Georgia Charter of 1732 was signed on April 21, 1732 and ended in 1752.
55 years/months
Water corrosion can effect the shapes of cliffs over a long period of time.
A decade is a period of 10 years. Typically we think of them in years from 1 to 10, like 2001 to 2010 or with years that have the same second last digit like 1990 to 1999. Any period of 10 years can be a decade, like the years from 2006 to 2015 inclusive.
20 years
20 years