How often does Google update the pagerank?

Is it every 3 months or so? Does anybody have any idea when the next one will be?

 

Pagerank is updated 24/7 365 days a year
You mean Toolbar PR which is snapshot of a month before, designed so webmasters can bragg and google can penalize sites for selling links.
The real question is how often is trustrank updated?

 

Sometimes I see a new site of mine get pr very fast, sometimes it takes 3 months. Kinda depends on where you are linked from, I dont think PR for every single indexed site is updated at the same time.

 

ranking and pagerank by google is a different term..........the Pagerank is updated by many other acitivties such as by google toolbar, user behaviour and many more........thus PR is a slow updated term and ranking of a website is done frequently.......PR is updated every 3 months

 

Big G Updates PR at around every 3 months.

 

basically it happens in every quarter but depends on google.

 

The most recent Toolbar Page Rank Update was on December 31, 2008.

My site went from "3" to "4" in that update.