This is the past and not presently, but when I did it took perhaps maybe.. 4 months we were in contact though and saw each other once a week and then gradually increased. We aren't still together however we see each other because we share a dog lol. What happened? Saw lack of effort and nothing really changed for the better.
me and my ex were apart for probably 2-3 months before we tried again, it only lasted a good week or so though. You need to realize you and your ex split for a reason and people don't change overnight. It takes time and normally why you guys spilt will reoccur. I've gotten back together with a different ex before as well and we were split for probably 5 months we only lasted for 2 weeks again. Things end for reasons, leave them be.