Not necessarily a rarity, but I'd definitely say it's limited. Everything in my world is. [... Not that that thought isn't also true. Ahem.]

[She nods... and makes a note to dig through the files later and learn a little more about Asgard. Just because she can.] The hosts may have their own names for things, yes. I'd be curious to hear if they bother trying to define a difference between all the different variations of "earth" that seem connected to here.