Not to be a smart guy but I once left my Bear SK strung for 6 months. I wanted to see how much the string would strech at least that is what I told wife.
I also remember Black Widow suggesting leaving their bows strung if possible. They theory was more bows get broke stringing and unstringing than from normal use.
Ideally wood core limbs should be let down when you aren't using them. Synthetic cores should be ok, but I have seen one brand (2 different models) take a set in their synthetic core butts. These were not Border.