Rotational Players - How long does it take you to rotate through every sim?

I checked my screenshots and found that the first round of my smaller rotational save, that started with five households, took me 10 irl days. After that first round I switched households depending on what happened in my game and who needed to react to it, effectively abolishing the concept of rounds.

But then again I didn't touch this save in a long time, so technically the current round has already lasted seven months.