Most of you, I'm sure, will respond with a resounding "0", but there are varying circumstances amongst each individual couple. One person in the relationship may have had a traumatic upbringing where their parent's divorce inflicted an intense fear in them. Or someone could have been raised by volatile parent's who should have gotten divorced but stayed together.
Many circumstances can cause a person to have angst or trepidation over formally unionizing their partnership. How long do you give a partner to come to terms with marrying when you both would like to see the relationship taken to the next level? At what point do you determine that, perhaps, it's time you two go your separate ways?
I'm curious to see the myriad responses to this particular question and hoping there will be some debate.