How to Rank for Long Tail Variations in Google

I've always held content quality to a high standard. One because that's what Google says they want, but two because I like to read. And my approach to publishing content has pretty much always been I like to write in a way and create content in a way that I myself as a reader would enjoy. So even if it says the search tool might say 400 searches a month, you could end up getting 10 times that volume of traffic for all the different variations that may or may not be included in that volume. But how many are there? It appears from the outside looking in like hundreds of articles, they're all like really in depth,. Like to have a sense of the volume of