There aren’t a lot of primary sources for Norse stories and really the only one in which Frigg plays a significant part is when she gets every creature and plant on earth to swear an oath not to hurt her son Balder. Loki, jealous of course, finds the one plant that Frigg didn’t think was big enough to hurt Balder (mistletoe), then tricks Frigg’s blind son Hod into stabbing Balder with it and Balder dies. Maybe we’ve lost all the stories about Frigg, but I’d like to think that she’s watched Odin and Loki and Thor and all the other gods cause problems with their ambitions and their seeking and their greed (and inadvertently causing her own son’s death by seeking to make him immortal) has decided she’ll just let the world turn as it will.