The length if time is really up to the individual and how long they want to continue. Some say they'll continue as long as it takes, others decide they have a shorter timeline. Ultimately it's up to you. Believe me, I wish there were a magic timetable that everyone fit in.. This would be so mug easier for all of us.
Keep your head up.
M34 W35 S5 S2 T10 M6 on/off over the years including her A Recently- Nov 2015 bomb Nov 2015-Feb 2016 Reconciling Feb bomb March-April Reconciling May - bomb Mid-May I tell her I'm done