
Quoting
Mr. Knowitall
They are looking at your absence from the country over the course of a given year, and within that context they use an aggregate number. If you choose to remain outside of the U.S. for more than 179 days, total, you can expect to be presumed to have abandoned your permanent residency with the onus on you to prove that you did not do so. The presumption is normally much more of an issue with continuous absence than with an aggregate number in the @180 day range, but the rule applies in either context.
As I know absolutely nothing about your state of domicile, if any, I am not in a position to comment on whether you can establish that you have a domicile in Florida. If you intend to establish your domicile in Florida on March 1, that's when your period of domicile in Florida would begin. If you have established legal domicile in Florida, and are presently taking a vacation, then you should not have a problem establishing your >90 days of legal residence.