Quick query on keywords

Tweet

I'm still a bit confused about keyword density - in particular, long-tailed keywords. I know that 3% density means 3 occurences per hundred words - is that right? e.g. if the keyword is MyLot, and density was 3%, and I had a 300 word article to write - that would be 9 inclusions in total. That's how I see it. I also know that generally there is more than one keyword at high densities, to avoid stuffing. However, what about long-tailed keywords (I know them as key phrases) For example, if the phrase was "why myLot is ace" that's 4 words - but does it get counted as 1 word or 4 for the benefits of counting? To keep it short - if I had a 300 word article, and my keywords were "mylot is ace" "mylot is cool" at the same 3% density, would I a) still include 9 occurences (a mix of the two) per 300 hundred words and b) do the word count based on the word phrases equalling one word, rather than 3? Hope this makes sense. If you've any experience at writing keyword percentage articles, I'd appreciate your help!