They usually learn any command pretty quickly, including potty training. Pits are an awesome breed, but make sure she knows that you are the alpha or she will take advantage of you. As an older dog (not a young puppy anymore), they learn even quicker when it comes to potty. I have several things I do for potty training and it usually only takes a few days at most. One, make sure she goes outside after every meal and after waking up. Use a consistent word, like outside or potty when you are taking her out. Praise her praise her praise her when she does go outside. Try not to let her too far away from you when potty training, that way if an accident does happen, you can tell her no in a firm voice and them take her out. Sometimes I have them on leash with me until training is completed. I highly recommend a crate, they provide security plus they don't usually mess in their "den". Overall, try to have some type of routine if at all possible until she is housebroken. It really sounds like she already knows commands or is extremely intelligent (if not both) so I am sure she will fit right in and learn new things quickly.