A little varation:
"Right Wing radicals" 1,490 matches
"Left Wing radicals" 1,920 matches
Lefties are more radical. Less bias here. Lefties are radical.
"right wing radicals" 3 matches
"left wing radicals" 2 matches
Additional search terms:
"radical right" 69 matches
"radical left" 53 matches
"right wing radical" 7 matches
"left wing radical" 5 matches
"radical conservatives" 2 matches
"radical libeals" 1 match
"radical conservative" 3 matches
"radical liberal" 4 matches
"extreme conservative" 6 matches
"extreme liberal" 4 matches (3 in reference to media bias)
"extreme conservatives" 1 match
"extreme liberals" no matches
"extremely conservative" 21 matches
"extremely liberal" 12 matches
"rabid right wing" 3 matches
"rabid left wing" no matches
"rabid conservatives" 1 match
"rabid liberals" no matches
"rabid conservative" and "rabid liberal" were used together in the same article
"right wing zealot" 2 matches
"left wing zealot" no matches
"right wing zealots" 5 matches
"left wing zealots" no matches
"radical republican" 3 matches
"radical democrat" 1 match
"radical republicans" 14 matches
"radical democrats" 2 matches
"right winger" 360 matches (this had hockey matches)
"left winger" 325 matches (this had hockey matches)
"conservative media" 84 matches
"liberal media" 145 matches
Almost all of these numbers are significantly smaller than matches found with the original search terms.
The characterization in the media puts "right wing" as extremist/radical much more than the "left wing".
As to hockey references to right/left wing, I'd think that overall they'd balance out (much like right turns and left turns in your car).
An interesting study could be made to search these terms every day for a couple of months and compile the tallies. Someone with Nexus search priviledges could do a much better job (scoping it to that day's articles alone and getting a fuller selection of articles).
As it stands, using Google would tilt numbers as some articles would weight the statistics (articles are available for several days meaning that they would be counted multiple times, also some articles get wider circulation seeing print in multiple papers racking up multiple matches but this would indicate a wider impact from the article).
As I say, it was a simple survey but I did not attempt to bias the findings. Radical was a good search term. Got any others?
Since some on the left are afraid to use the term "liberal", what is another search term? "Progressive" didn't hit well. There were 624 matches on the term fascist (with another 206 "fascists"), at least some of them applied to President Bush or his administration.