duration
noun OPAL W
  /djuˈreɪʃn/
  /duˈreɪʃn/
[uncountable] (formal)Idioms - the length of time that something lasts or continues
- The school was used as a hospital for the duration of the war.
 - a contract of three years’ duration
 
Extra Examples- Taking antibiotics will shorten the duration of the illness.
 - The next contract will be of shorter duration.
 - The overall duration of the flight was 11 hours.
 
Oxford Collocations Dictionaryadjective- brief
 - short
 - limited
 - …
 
- decrease
 - reduce
 - shorten
 - …
 
- for the duration (of)
 - of… duration
 - throughout the duration of
 - …
 
Word Originlate Middle English: via Old French from medieval Latin duratio(n-), from durare ‘to last’, from durus ‘hard’. 
Idioms 
for the duration 
- (informal) until the end of a particular situation, especially a war
- His wife and children had gone for the duration to the Lake District to escape the bombs.