Both Uses of

duration
in
In the Unlikely Event

She brushed out her hair, cut in a becoming style that never touched the collar of her suit jacket, and fastened her jaunty cap, which she had to leave on for the duration of the flight, not that she minded.†
p. 275.9 *

duration = the time during which something continues

The first summer he'd picked her up in Las Vegas and driven her back to Los Altos, where she never even met Adela, who'd had such a severe migraine she'd moved into her parents' house for the duration of Miri's visit.†
p. 469.4