How common is it to have two teams historically bad at the same time?

In 2011 there was a 3 week stretch were Melbourne lost a game by 186, Port lost 2 games in a row by a combined margin of 303 (138 and 165) and Gold Coast lost by 150 a very brief amount of time but all those games broke several records.

186: Biggest margin of the AFL era, Biggest winning margin by Geelong, Biggest winning margin at GMHBA. (Somehow it isn’t Melbourne’s largest losing margin)

138: Port Adelaide’s lowest score, Port Adelaide’s biggest losing margin.

165 Hawthorn’s biggest ever winning margin, biggest margin at the MCG, Port’s biggest losing margin (yes they broke it 2 weeks in a row), biggest combined losing margin in a 2 consecutive games (303).

150: Gold Coast’s biggest losing margin, Biggest combined winning margin over 2 consecutive games (336).

Edit: Could make it a 4 week stretch because the week before all of this chaos happened Adelaide lost St Kilda by 103.