Keyword Density Ratios...

Posted in this newsgroup recently:

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Eventually make sure all the words on the page add up in the following
proportions. i.e. model appears about 7 times. Exoto appears about 4 times.

7 model car
6 diecast
5 scale police new toy car
4 Exoto Auto Art Guiloy
3 cars uk sale

You can alter these ratios when you analyse what your potential customers
are looking for.
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Can someone elaborate on this theory?
thanks
mark