Stats on memetics vs cultural evolution

I thought it would be interesting to attempt to quantify how memetics and cultural evolution are doing on the internet, relative to each other:

One methodology is to apply Google search statistics to their terminology:

Alas, most of their terms typically don't have enough volume to allow the use of Google Insights for Search. However I can do this:

...and this:

In other cases, I'll have to use static figures.

Memetics	Count	Cultural evolution	Count
"memetic drift"	9,230	"cultural drift"	53,500
"meme"	56,900,000	"cultural variant"	10,600
"memetics"	756,000	"cultural evolution"	1,020,000

Of course, science is more than just a populatity contest - and there are about a million other ways in which this methodology is limited.