Update and correction: The company e-mails in and says AdAge story was inaccurate…the schedule is being cut not to a bi-weekly, but 36 issues a year. According to Sabrina Crow, SVP of the Media and Marketing group at Nielsen Business Media, the company is relaunching Adweek.com, with more breaking news, and with exclusive Nielsen data.

Original post: AdWeek, the ad trade magazine owned by Nielsen, may have to rethink its name now: it is cutting its frequency from a weekly to a bi-weekly, as the Nielsen Business Media group continues to try and redefine itself after the PE buyout, and the sudden loss of its CEO earlier this year. The change will happen in January…no changes are planned for siblings Mediaweek and Brandweek, which will continue publishing on a weekly schedule, reports rival publication AdAge. Both the ad trades have been hammered by the changes in the industry, though AdAge has done a much better job online than AdWeek…the story says AdWeek will now devote more resources to its site.

—Update: According to a study of Q3 magazines in the media/advertising category by MIN’s B2B newsletter (subscription req.) earlier this month, AdAge’s ad pages have been up 16.85 percent year-to-date, while Adweek’s declined 2.23 percent. Meanwhile, looking at ad revenue comparisons, AdAge gained 22.08 percent, while Adweek’s YTD ad revs slipped .33 percent.