Frigaard family/farm info

I'm interested in general info on Frigaard family ancestors from around 1800 (descendents also), from the Trondheim area. From my research there are 2 farms with that name, at roughly that time: (i) Near Stordahlen (my family) (ii) Near Aasen I suspect that the families are not related as the distance is large for that era, but maybe you know otherwise? There seemed to be a general migration from both farms towards Trondheim in the 1800's, and then further. Secondly, can anyone explain the origin of the name (=free farm)? We have 2 ideas within our family: (i) These were "freeholders" in ancient times (ii) The land was terrible and given to them for free regards Ian