week
The Italian word 'settimana' is used exactly as the English word 'week', to represent a period of seven days. It is commonly used in discussing schedules, durations, and intervals.
Next week I will go on vacation.
This sentence uses 'settimana' to indicate a specific time in the future (next week) when the speaker will go on vacation.
I worked for five days this week.
In this context, 'settimana' is used to describe a recent period of time (this week) during which the speaker worked for five days.
Every week, I visit my grandparents.
Here, 'settimana' is used to denote a recurring event that happens every week - in this case, the speaker visiting their grandparents.