It's a great article.

Why are you sharing the technique though? This seems like it would work best if the rest of us aren't using this technique.

Sharing is caring really. I've analysed numerous content niches with this technique (lots that I haven't produced content for) and there is so much opportunity there that I feel people should take advantage of it.

I believe he is running a consultancy, and if I were about to hire someone for doing this work I would likely be pretty inclined to hire him.

Since you’ve generously offered, I’ll take you up on it

I’ve wanted to learn more about this whole area for a while now but was never sure. I'd like to do more reading — is it SEO or content marketing or something else again maybe?

I'm really into woodworking and keep thinking that there's room for good blog-style content in the sea of other information that's out there. But I've never really known how/where to jump into that.

Would love you thoughts!

Are there any free tools we can use to apply this technique?

I haven't checked all the tools, but even out of the paid ones SEMRush is the only one I've found that allows you to export all the keywords in a way to make this technique effective.