毎週

1. Origins, structure, and basic meaning

• Structure: 毎週 is read as まいしゅう and expresses the frequency every week.
• Basic usage: It can precede a day of the week in a recurring schedule or set the weekly interval over which something changes.

2. Common pitfalls and similar expressions

• With a day of the week
  • 毎週土曜日 directly combines the weekly frequency with Saturday to mean every Saturday. Example: 毎週土曜日に図書館へ通っている。
• Something different each week
  • 毎週違う does not mean the same thing repeats; it means the content differs from week to week. Example: この市場は毎週違う店が出る。