seven days a week
A set phrase meaning every day of the week, without a break. Often used in contexts like work, study, or service availability.
この店は週七日営業しています。
This shop is open seven days a week.
彼は週七日働いている。
He works seven days a week.
Compound of 週 (しゅう, 'week') and 七日 (なのか, 'seven days'). The reading なのか is the native Japanese counting form for seven days.