"She'll have more of an idea how to use it than most," Strange explains. After all, it's a fae thing. And, since she's a fae, Strange is banking on the Ringmaster's knowledge of fae things more than either of theirs.

As for the question, Strange does some quick mental math before answering, "Just a few more months, I think. Going home for a while knocked my calendar for a loop." Especially since Strange wasn't entirely sure just how long he had spent in the darkness.