I've big problems with the "wait one year for every five you were married". There's no way I want to go five years before even thinking about the loving companionship of another woman in my life. That might work for younger people, but I'm 56 and have to make the best of the life I have left.
I set my sights on a year, if I can't see any positive results with my relationship within that time I'll have to think of moving on. I'll have moved so far on in redoing my life by then I'm not sure my wife as she is now would be compatible anymore. As bad as that sounds there comes a point we have to think about these things.