The phrase 'during two decades' is grammatically correct and can be used in written English.
It is typically used to indicate a period of time of 20 years. Here is an example sentence: "During two decades, the country experienced significant economic growth and modernization."
Mr. Lloyd also has the credentials for a critique, having written two books on antimissile warhead design during two decades at Raytheon, a top antimissile contractor.
The median numbers per year did not vary during two decades (24 in 1980s; 22 in 1990s).
This study presents data on trends in illegal drug supply in a variety of settings during two decades, including consumer and export drug markets.
The second aim was to describe human STEC infections in Norway during two decades (1992 2012), to compare with studies from other countries and contribute to our understanding of this infection in general.
A retrospective study of the demographic, clinical, and laboratory markers for CF treatment at a CF referral center was performed during two decades: 2000 (DI, 1990 2000, n = 104 patients) and 2010 (DII, 2000 2010, n = 181 patients).
In Sweden only 10% of the GPs are the age of 30 to 40 due to limited recruiting during two decades, which explains the narrow age span of GPs (The Swedish Medical Association, personal communication).
Most of the eucalypt plantations in India were raised during two decades between 1960 ~1980.
DURING two decades of civil war and two years of ceasefire, Sri Lankan politics have been a study in contrasts.
DURING two decades in power, Brazil's military rulers opened the interior to agriculture, invested heavily in energy and communications and encouraged industry to compete abroad.
DURING two decades of rapid economic growth, Santiago has gone from a compact city at the foot of the Andean cordillera to a sprawling metropolis of some 6m people.
Consider them gracious and empathetic compared with the denizens of "Gilded New York: Design, Fashion and Society" (The Monacelli Press) during two decades of excess from 1885 to 1905.
