When are You Living Together?

Was watching an old episode of "Big Bang Theory" which
I had not seen before and Seldon was invoking a clause
in the tenent agreement whereby Leonerd was living
with Dr. Stephanie. The clause says that "If a girl
friend stays every weekend in a month and three other
week days it is deemed that she is living with Leonerd."

That is pretty harsh, given that the average month has
30 days, that is only 11 days in the month, not even 50%!
Even Centrelink is not as bad as that, their ruling is
4 days a week, thus 16 days in the month! or just over
50%. I reckon it should be closer to 60% or 5 days a
week.