Keyword chart vs actual results

[LONEMAN]

I'm trying to promote a product through a website I have set up so I'm trying out various keywords with a low advertiser competition and a high search volume. However, when a certain keyword is entered in Google's search field, the results don't match up with the keyword chart.

For example, if I type in "live free" the keyword chart displays a high advertiser competition and an average search volume of 673,000 but when entered in Google's search field, there is only one advertisement. Am I a total noob missing something here or is there a relevant answer to this? Thanx.