Definitely 2 weeks ... wooden floors, especially solid ones won't like a room with a lot of moisture in it - just remember the amount of water your plasterer used mixing up the skim.. it all has to go somewhere.
Give it a good bit of time to dry out .... it will dry out faster if it's in a house with heating on etc.
When you get the wooden floors it's a good idea to get the timber a few days before the carpenter comes to lay them (given punctuality of tradesmen etc. I'm sure this will be easy to arrange ) ... leaving them sitting in the room allows them to adjust to the temperature/humidity of the room apparently.
Recently installed a solid wooden floor and was told to leave it for 3 weeks to aclimatise..........3 weeks!! I kept tripping over the stuff. It was solid Maple
Leaving the wood 2 to 3 weeks would definitely be preferable. They will expand, even after this, but giving them the few weeks will prevent them expanding too much after they are put down
Just a note of warning on leaving the wood out to aclimatise before laying it - this is very dependant on the type of wood you are laying. For example a Juncker solid beech floor is to be laid straight from the packaging without being aired at all.