@sporting while agreeing with my colleagues @xmasbaby0 , @Bsch4477 , @VolvoGirl , from your statements,
if you claim that you used each of these two properties as your main home for ONLY 5 months each year, then you will meet the 730 days total use requirement and the 2 year ownership requirements ( with a five year look back period). Thus you could choose which house you want to claim -- only One -- as your main residence ( usually the one with the actual larger gain. But either way , you would need to make sure that you can actually prove that the chosen prop. is the one that you have used as your main residence.
That is my two cents.
