forty-year
Examples
Army Corps of Engineers geologist Fred Smith once stated, "The Mississippi wants to go west. 1973 was a forty-year flood.
During this forty-year period, two popes—one in Avignon and one in Rome—claimed rulership over the Church.
As a world expert on radio and new trends in broadcasting, Ahern shared his world experience gained from a forty-year career in media in different countries.
The controls were effective, but it took several decades to take effect; by 1999, there were signs that large numbers of mayflies were spotted on the lake after a forty-year absence signalling a return to health.
By all accounts, her forty-year marriage to Edward had been happy.
This treaty ended a forty-year period of warfare between France and Spain conducted in Italy from 1521 to 1559.