how long does it take for google to remove old website data?

I have a email, (the one i used to apply for university). If i google that email, it will link to my profile on this stupid forum where I registered over 2 years ago. I don't want the university to see that I was a part of this stupid forum. So, I logged into that forum and choose the option to hide my email. and it no longer shows my email. Now it's been over 2 weeks, and when I google, that website still shows up, except with no email when you click on it, but still shows my profile...

I wonder how long it will take for google to remove that from the list....

Delete your account from the forum?

My posts in Yahoo answers are still there from two years ago, even though I deleted my email back then. IDK why the big companies do this kinda thing...

Ouch. They probably won't google your email address though. But yeah... make and use a more personal email that you use for stuff like college and bank accounts and whatnot.