Original sentence: The practise has in the Nordic countries been won through practice over hundreds of years.The right existed for a long time only as a customary law, but has in recent years been established as written law{fact}
Edited sentence: It is not known when it changed from common practise to become a commonly recognised right.The right existed for a long time only as a customary law, but has in recent years been established as written law.The right has in the Nordic countries been won through practice over hundreds of years