That's probably true for people who know the words but is it true for people who don't? I expect most people use most common words at about the same level of fl

That's probably true for people who know the words but is it true for people who don't? I expect most people use most common words at about the same level of fluency. I know the word "computer". I expect people's "computer" fluency is correlated with their general fluency. Would teaching Victorian peasants "computer" increase their general fluency?