memes

While I appreciate the time you put into this, you haven't really addressed my criticism - that podcast spends ~30 seconds on the topic, and even as explained in the article from whatever pride.com is, do not make a concrete statement beyond their own impressions. They even explicitly say that they feel like they are in the minority and that the prevailing attitude of lesbians is that we/they as a group don't scissor. Also, there is a single comment on that page in support of their presentation of scissoring. That's... not a plurality of support, nor is the podcast's comment at odds with their own characterization of the culture surrounding the act presented in the podcast itself.

I'm not sure what your goal is with presenting the history of the term, but it is interesting to see the wikipedia article rewritten so succinctly, thank you!

Ngram viewer - it's a representation of the data contained within it yes, as their initial paper says, but the way you're using it here is at perfect odds with your own characterization of the service:

it’s true the corpora don’t reflect general language & culture

Which is what you're claiming it does. If you're shifting it to mean that tribbing hasn't appeared in print much, I already agreed and my hypothetical addresses exactly this issue, as does the excerpt on the criticism of Google Ngram. Also wikipedia directly addresses this:

Scissoring is commonly used as an umbrella term for all forms of tribadism, and many lesbian and bisexual women are unaware that some of the sexual acts they include in their lovemaking are aspects of and are formally labeled tribadism, as tribadism is commonly omitted from mainstream sex research.

So there's really not much to be said about it's frequency of use in print media, just about the driving reasons behind it.