Sorry to hear thisYour frog likely parished if he's been out of the tank for a week now. If he managed to find a water source there's still a chance. When frogs die in the house they normally get covered with dust, dry up, and never stink. If you ever find it dead it will look like a frog mummy.
For future reference, if this ever happens again, place dishes of water all over the place. In every corner of every room, under furniture, etc. Check the water dishes multiple times daily and there is a good chance you'll find your missing amphibian.