English version

triennial in Chronology topic

From Longman Dictionary of Contemporary Englishtriennialtri‧en‧ni‧al /traɪˈeniəl/ adjective  TMChappening every three yearsannual
Examples from the Corpus
triennialAt their triennial congress on Sept. 15-21,1990, delegates adopted a new party programme replacing that of 1975.June 30 would mark the end of the triennial contract cycle that had punctuated labor-management relations in the copper industry since midcentury.The triennial election for the Senate Presidency took place on Oct. 2.The Fourth Lateran Council, held at the end of his reign, imposed a triennial twentieth for the same purpose.