triweekly

Happening, done, or appearing three times a week.

Happening, done, or appearing every three weeks.

Three times a week.

Every three weeks.

A periodical published triweekly.

Occurring, performed, or appearing once every three weeks.

Less correctly, occurring, performed, or appearing thrice a week: as, a triweekly newspaper.

Occurring or appearing three times a week; thriceweekly.

Published three times a week.

A publication published three times a week.