Google Relateness calculates how related two words are by doing three searches. Two words have a "relatedness coefficient" of 2 if they appear together twice as often as you would expect with a total of N = 2,073,418,204 pages. Example output:
|First term||Second term||Intersection||Relatedness|
To use Google Relatedness, you need the Mozilla browser and a free Google API key. After you download the zip, edit key.js so it contains your Google key.