There is a timeline leading up to the crisis and that is 18-24 months. This is the timeline whereby something sets the crisis in motion and there is an 18-24 month timeline once the crisis is over calling the "settling in period" whereby reconnection takes place. Both timelines are not the actual clock setting timeline you are looking for. Generally, when you the LBS gets the BD, that is the time is will start as well for the MLCer. Up to that point, they are just thinking about things and once the BD happens, all h@ll breaks loose and there is no turning back for them.
Try to remember that each person in crisis will have similar behaviors, actions, words, but each is unique because of the childhood issues and personalities. Some complete in 2-5 years and others could b 7, 8, 9 10 or never come out of it. So timelines are just a guide.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.