There are certain tests floating around, like they will try 50ish quiz to estimate your vocabulary size. Those are not set-in-stone science, so it is just an e

There are certain tests floating around, like they will try 50ish quiz to estimate your vocabulary size. Those are not set-in-stone science, so it is just an estimate, but I take about 10+ over those years, and the the number from those estimates seems consistent. Coverage, there is some paper to track, I just googled it.