I looked up "wheels in motion" and "gears in motion" to test it.
For "wheels in motion" it said:
3002 documents found - 0.0310 seconds search time
For "gears in motion" is found only about 1/10 that many:
201 documents found - 0.0140 seconds search time
(Maybe that's why I'd never heard the second one before last week?)
It gives you standard search-engine type listings, so you can click
on the URL and see the phrase in context.
It's not the BNC, of course, but it might be interesting for some purposes.
From email@example.com Thu Oct 28 05:30 PDT 1999
Date: Thu, 28 Oct 1999 20:30:00 +1000
From: OnLine English <firstname.lastname@example.org>
Subject: Resources for publishing in English
Announcing a new WWW site for OnLine English
* a full outline of its editing service for academics and researchers
* writers' links for researchers and other professionals
* the OnLine English phrase checker, a new way of using search engine
technology to check any English phrase and better understand how English
works in context (http://www.oleng.com.au/indexpc.html)