Wasn't it last happened like.. this year mid-year? Ever since then, l/e kamihime only appear with reprint pickup since Nutaku would like to keep up DMM's gacha system, which DMM did it in July (or so? or less? dunno, with no guarentee the SSR~R weapons will be the l/e)
And recently in DMM (back in Ikki Tousen collab, isn't it? l/e's that supposed to be 1-month in gacha pool are now only 1-week, and Nutaku decides to do that too, which pissed the sh-t out. Well guess you will solely depend on luck from now on (and cash if you don't mind).