From http://www.webproworld.com/viewtopic.php?t=13268

According to OneStat, the 7 most used word phrases in search engines on the web are:

1. 2 word phrases 32.58%
2. 3 word phrase 25.61%
3. 1 word phrases 19.02%
4. 4 word phrases 12.83%
5. 5 word phrases 5.64%
6. 6 word phrases 2.32%
7. 7 word phrases 0.98%

interesting!

cheers,

Luke