In learning German, I like to keep track of a few goals, one of such being to learn 2000 unique german words. The thing is, the official German courses repeat a lot of words, whether as basic phrases to put the words into context or teaching the same lists of words in the later courses (e.g. the days of the week taught in both German 1 and 3).
What I want is simple, I want to find how many unique words I have learnt at any given time. It’s almost impossible, I know, but is there any way to do this. Like is there possibly a rule that says something like 5% per each previous course is repeated in the newest course, thus working out to find how ‘unique’ each course is.
Currently, I have memorised 1900 German words from official courses according to memrise. In reality, would this be: 1500, 1700 or 1800? Similarly, at what point will I actually have learnt 2000 words, would it be 2100, 2300, 2500?
Hope you can help me out!