There is keyword density and keyword frequency, there are plenty of free tools out there that you can use to write good seo articles or to check your site for your keyword density. Try tools like seo quake for your website and article jockey for writing articles.. To add to that - I really don't like to write articles for search engines, I would rather let it happen naturally and let the search engines decide what is relevant to what the users want.
The info is at least 2 years out of date Single keyword phrase 5% to 10% density You've got to be joking! Have you never heard of LSI? - google been using it for the last few years to rank web sites (backlinking still important)
i'm not agree with "Google doesn't care about articles, just keep KW density 5-10% and target one KW per page that's it." i think you can be a good rank for a moment after that google will ban your website bacause google TOS.
almost all of on this thread get banned?.. why?.. and where is Titing Kabayo now?.. I need his advise.