Answer: decades

AnswerCrossword Clue
DECADES

They last for years

DECADES

U.S. Census intervals

DECADES

Timeline divisions

DECADES
Millennium hundredths
DECADES
The '60s and the '70s
DECADESYears and years
DECADESThe Gay Nineties and Roaring Twenties
DECADESTime line segments
DECADES10-year periods
DECADESMany years
DECADESPretty long time
DECADESVery long time
DECADESDecenniums.
DECADESGroups of ten.
DECADESThe Twenties and Thirties.
DECADESCentury units.
DECADESPeriods of time.
DECADESTime periods.
DECADESPairs of lustrums.
DECADESTime periods
DECADESMauve et al.
DECADESThe Roaring 20's and others
DECADES10's and 20's, e.g.
DECADESYears of plenty
DECADESThey take years to end
DECADESDivisions of a century
DECADESThe 1980s and '90s, e.g.
DECADESCentury parts
DECADESSome career lengths
DECADESTen-year stretches
DECADESGay Nineties, et al.
DECADESLong stretches
DECADESRetrospective segments
DECADESRetrospective divisions