Take her out every two hours when she is out. Plus as soon as she wakes up from a nap, take her out, when she is playing, take her our more ofter. Usually when she wakes up, after playing, before she eats, and after she eats, take her out. As she gets older, you can make the time out a little longer until she finally gets it. It also goes by age. They can usually hold their pee for one hour of month of age. So if she is 4 months old, then she can hold it for 4 hours. Sometimes longer and sometimes less. Be patient with her and take her out offten and make sure she goes when outside and praise her like crazy when she goes outside.