duration
US /duːˈreɪ.ʃən/
UK /duːˈreɪ.ʃən/

1.
durata, periodo, arco di tempo
the length of time that something continues or lasts
:
•
The duration of the flight was six hours.
La durata del volo era di sei ore.
•
He worked tirelessly for the entire duration of the project.
Ha lavorato instancabilmente per l'intera durata del progetto.