A1
a period of seven days
Dictionary examples:
I slept for a week after exams. (0.0)
I wore pajamas to work this week. (0.0)
My dog ate homework for a week! (0.0)
Don't do any sports for a week or two. (8.0)
last/this/next week (9.2)
We go to a restaurant about once/twice a week. (25.1)