When does she have her accidents and how much time passes between accidents? Typically a dog should be let out to potty the first time in the morning, around 15 to 30 min. after eating, it wouldn't hurt to take them out before work, and soon after you get home from work (and if you work all day, perhaps see if you can get a dog walker or someone to let her out in the middle of the day) and then after the second meal, after period of play, and then before bed. And when she goes outside make it a big deal and tell her good girl and act a little silly. If the neighbors don't think that your odd (unless they understand it) then your doing it wrong. Praise her every time that she goes outside where she should.

She needs to be let out around 4-6 times a day a. Also make it a routine. Even on off days. You may be able to switch times a tad, but you should take her out around the same times like I mentioned about.