Same here. And, I have an extremely wide vocabulary. By high school I'd achieved the vocabulary of a journalist - about 50,000 words.
I generally can read a book without encountering any words I do not know.
However, I did read one astounding book this summer.
After reading about the fourth unknown (to me) word early on in the book I decided to start circling each of the future ones in the book. I ended up circling somewhere between 20-40 words.
I achieved that vocabulary in high school from two years of without fail looking up every word I did not know. Sometimes I'd have to look up the same word nine times because I honestly told myself I still did not remember what it means.
Because I was outside reading that book without a dictionary I did not look up the meaning of any of those words.
But I did put it on my things to do to put all those words in a list and to look up all their definitions and put them next to their respective words.
Once I do that I will put that list in a Topic here as a challenge to any to see which of those words that they do know.
It is, though, one of those things I may never get to. Or, it could be one of those things I impulsively decide I am going to do now.

