Fridhem is actually the name of multiple sites in Sweden, usually ones that are supposed to have some connection to serenity in some way: churches, cemetaries, mental health institutions, etc. The area which is Fridhemsplan today already had a hospice, after which I assume they named the place. So the meaning is something like "plaza of the tranquil house".
I think that frid is peace in the sense of calm or serenity, whereas fred is peace in opposition to war.
So if i remeber this like 'freed=inner peace', is that toing to mess me up later?