Computers sometime do things oddly. So Googling "4th amendment" yields different results than Googling "fourth amendment". Also, that version of the Google icon differs from yesterday's, suggesting the experiment was done a year or several years in the past. So, repeating the experiment:
"second amendment" - "About 8,160,000 results"
"2nd amendment" - "About 742,000 results"
"fourth amendment" - "About 6,220,000 results"
"4th amendment" - "About 1,290,000 results"
"fifth amendment" - "About 42,600,000 results"
"5th amendment" - "About 707,000 results"
"twenty-fifth amendment" - "About 2,050,000 results"
"25th amendment" - "About 1,710,000 results"
Just as "controls, chosen without reference to the purpose of the amendments:
"seventh amendment" - "About 14,900,000 results"
"7th amendment" - "About 15,000,000 results"
"twenty-fourth amendment" - "About 2,430,000 results"
"24th amendment" - "About 1,250,000 results"
Like DU calls for "general strikes", DU folks' Google Bomb 2.0 // Twitter Bomb 0.5 effort is, well, bombing. Predictably.