for the duration
For the entire period of time that something lasts. Oh, we've already stayed in the house through four weeks of construction, so we're here for the duration! Emma isn't the type of friend who will abandon you when things get tough—she's here for the duration.
for the duration
for the whole time that something continues; for the entire period of time required for something to be completed; for as long as something takes. We are in this war for the duration. However long it takes, we'll wait. We are here for the duration.
for the duˈration
(informal) until the end of a particular situation: Kate has the flu so badly that she’s confined to her room for the duration.