>>212228561C2 English is about 10,000 words which is three years at that rate. Personally I would call C1 "fluent" or at least conversational, and that could be only 5000 words
>>212228475I do what I can with the hours I have in the day. Graduate studies are no joke though timewise. Most other PhD students from outside Germany barely make any progress in the language, so while I could have done better, I also could have done much, much worse.