FromRocky - 5:43 am on Mar 6, 2008 (gmt 0)
There are a small number of terms in popular head but thousands in the long tail. So they are not the same but many variations. Some of these terms in the long tail are not formed by a natural result. You must design for them. I have seen some with hundreds of visits a day. I called them long tail because their search results are always less than 10.