Marriage to an affair partner has the highest failure rate of all marriages. Not sure if that is what you are asking about, and more clarity would be helpful.
I personally think it is a really big mistake to leave a marriage for another person. For one's own mental health, you should take as long as it takes to learn to love being on your own. Then you will only give up that freedom for someone really special, who adds so much to your life that the conflict is worth it--and worth the loss of freedom.
I've read that the "standard" is one year of being single for every 5 years married--but for longer marriages, like 15+ years, that seems a bit off. Maybe 3 years for 15 years of marriage, and then a couple of days for each year thereafter?
I will add that I am only entering my 3rd year as a single person, and I wanted to be single--and it was not easy. I'm still dealing with fallout, so to speak, but more financial and logistical than emotional. I imagine that a person who did not want to divorce might be on a different timeline, needing more time to adjust emotionally and before beginning the serious rebuilding--not the "getting by""--of a new life.
Wait, what was the question?
