By "people" you mean "[Roman] Catholic Europeans after the genesis of the imperial papacy", right?
because those two things do not mean the same thing at all
Well, sure. The Catholic Church forbade divorce - still does, of course - I recognize that there were always people in Europe outside of its sphere. Pagans, Albigensians, Moors, not-yet-Christianized Vikings, etc, etc.
Here's what Wikipedia says on divorce in Medieval Europe.
http://en.wikipedia....Medieval_Europe
After the fall of the Roman Empire, familial life was regulated more by ecclesiastical authority than civil authority. By the ninth or tenth century, the divorce rate had been greatly reduced under the influence of the Church,[52]which considered marriage a sacrament instituted by God and Christ indissoluble by mere human action.[53]
Although divorce, as known today, was generally prohibited after the tenth century, separation of husband and wife and the annulment of marriage were well-known. What is today referred to as "separate maintenance" (or "legal separation") was termed "divorce a mensa et thoro" ("divorce from bed-and-board"). The husband and wife physically separated and were forbidden to live or cohabit together; but their marital relationship did not fully terminate.[54] Civil courts had no power over marriage or divorce. The grounds for annulment were determined by Church authority and applied in ecclesiastical courts. Annulment was for canonical causes of impediment existing at the time of the marriage. "For in cases of total divorce, the marriage is declared null, as having been absolutely unlawful ab initio."[55][56][57] The Church held that the sacrament of marriage produced one person from two, inseparable from each other: "By marriage the husband and wife are one person in law: that is, the very being of legal existence of the woman is suspended during the marriage or at least incorporated and consolidated into that of the husband: under whose wing, protection and cover, she performs everything."[58] Since husband and wife became one person upon marriage, that oneness could only be annulled if the parties improperly entered into the marriage initially.
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From the Church's point of view, you had only two options:
1) legally separate - which you could, of course, do, but the Church still would consider you to be married, just living "apart lives"
2) be given an annulment
If you knew the right Churchfolk and greased their palms, annulments were apparently quite easy to get. Apparently, it would be discovered that the priest who performed the wedding vows skipped some important ceremonial declaration, and guess what, therefore the marriage had in fact never taken place. Annulment granted.
Elsewhere in the article, it notes that divorce was certainly accepted in Greece and Rome prior to Christianization, although it carried a certain stigma, maybe not unlike how divorce did so in American culture until the 2nd half of the 20th century. Generally, almost every culture throughout history has rites of marriage - and along with that, rituals for those who want to end it.