Frosty and Swandy are a waste for a wizard, especially because you have to #offer mountains of sacrifices to get the skills unlocked. Mbane enchanted is enough of a weapon on its own along with attack spells. And you can get dagger skill up to expert easily.
Those swords barely do any more damage than Mbane even in the hands of combat classes.
I never seem to have that much trouble unlocking them if I've gotten that far.
My neutral human wizards always have either Frostbane or Grayswandir (Magicbane as backup/for MR), robes, silver dragon scale mail, boots of speed, enchanted T-shirt, gloves of dex, etc.