The way I figured out was I have a site at number 1 for the keyword and it is supposed to be getting 6600 searches/month. It is a one keyword phrase
So I was thinking I would be getting some sales. WRONG!
My site only gets about 5 visitors a day. I noticed this with a few of my other high ranking sites(all of which were built using Google's data) So I decide to run an adwords campaign to see the impressions(I know..I will be doing this from now on) and then I run over to Wordtracker
Guess what? The Word Tracker tool was WAY more accurate to the number of impressions my adwords ad got than Google's keyword tool
I am beginning to think Google is inflating these searches so that people will bid on these terms. Pretty clever...but it looks like I am actually going to have to pay them for research via adwords. They are starting to piss me off...maybe I should go have a beer and cool off