Question regarding two-week disposable toric contact lenses?!

Question regarding two-week disposable toric contact lenses?

Is that assuming I wear them at least 12 hours a day, every day, or can they be stretched into three or four weeks if sometimes I don't wear them at all in a day, i.e., a lazy weekend where I stay home?

First off,the fact that you have a toric lens you face a greater chance of problems stemming from contacts so I wouldn't push the time limit on any contacts that you might wear.
Trying to keep up with how long you have worn a pair would be next to impossible and with that in mind you could be wearing those contacts way beyond the allowed period of time.
There is going to be a certain amount of protein build up on contacts regardless of how well you take care of them and to push a pair of contacts beyond the recommended period of time is asking for corneal problems and as a toric patient you can't afford these kinds of problems.
Wear your contacts as prescribed and don't alter this. . . it is in the best interest of your cornea.