Hi all, Not sure if I ever posted this. Dan Ciubotaru from Romania developed a free software and online tool called Configuration Hunter, where you can search planetary configurations, midpoints, aspects and a bunch of other stuff over long periods of time. Great tool if you are searching for the last time (or how many times in the last several thousand years) for example Pluto squared Uranus, you can do it by aspect, apect and sign etc... You can also download a free software....
http://www.configurationhunter.com/astrology-tools/planet_positionsHappy researching!!!