because i once ranked in the Netherlands on #5 (number #8 inclusief adwords results) on a great term with more then 1.000.000 visits a month (said Adwords), but it only gave me 70 visitors a day.
If you use the AdWords tool for optimising your site for organic search, then there's no reason to expect your visitor count to be directly related to the total number of visitors recorded for a given term. The AdWords figure (1,000,000 in your case) is the total visitor count across all sites, from all visitors, throughout the world (subject to any filters in force). Your own figure (70 per day) depends on many factors that have nothing to do with AdWords: how well optimised the site it for the keywords in question; the quality of your snippet text (which is what searchers use to decide whether to click through from the search results); and, of course, the quality of the competition.
Also, the fact that you are seeing your site at #5 doesn't tell you anything. Search results are highly personalised these days, and you can't draw any useful conclusions from the results that you personally see from your own searches.
Tools like the AdWords keyword planner are useful for identifying search terms that you might not otherwise have thought of. But you can't use them to draw any conclusions about the number of visitors to expect as a result of those keywords.