I've had mixed luck, like it really does come in waves. No wolves for a day or two, then 5 in 2 hours. Encounters in similar manner, nothing for hours on end, only to end up with 2-3 back to back.
I don't know what it was like before the KB update, but I've only gotten one WW out of 17 encounters >> (I have 16 KB) Granted I'm not really grinding a whole lot but it does feel like encounters are a super low possibility, even when in the third sword area.
Got my first ww yesterday after 11 total encounters. had four in one day. maybe i'm just lucky. sold her off because i didnt care for her but i don't think i'll be getting another ww for a while either.
I haven't gotten one yet, and i haven't had that many encounters either. i've spent plenty of time in the campaign, but it feels like i'm extremely unlucky.