How Much Time Did You Spend Building These Decks?

I made 10 cards a day for about five years. I ended up with like over 15,000 flashcards. And then I had a huge vocabulary that was almost unparalleled to native speakers. So it's only like 3000 or something odd words that you need to know. You learned 15,000 words in and yeah, in on key plus those other words that I just picked up through osmosis.