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 | ||
|---|---|---|---|---|---|
| foo | 2,120,000 | bar | 19,900,000 | 341,000 | 16.76 |
| foo | 2,120,000 | mozilla | 4,320,000 | 47,800 | 10.82 |
| eigenvalue | 247,000 | mozilla | 4,320,000 | 141 | 0.274 |
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.
Google Relatedness includes a JavaScript library for the Google Web APIs that was written by Eric Hodel.