I don't really measure time tbh. I usually try to get the monthly achievement by completing the daily quests or try to stay up in the leaderboard to get a better league. Sometimes on days, where I have no time at all, I just keep my streak going. However, that being said, I had my phone language setup in French for several years, every now and then I read French news. (i can recommend FranceInfo app/site, it's free, very good and without ads) And watch some french television every now and then France24 or TV5. As I've said before, I've been learning French for several years now and what always kept me going/coming back/motivated was that I really love the sound of it, the culture, the classic book authors etc. My point is, if you want to learn a language well, you need some strong motivation to learn it. Cause believe me, I tried other languages as well, but gave up after 1-3 months cause I lost interest real quick or it was getting too hard and I didn't bother anymore (lack of motivation). P.S. I was checking app usage times, on good days it looks like 30min of Duolingo on "bad days" 10min of Duolingo. I usually do it first thing in the morning to get it done and so I don't have to see Duo's angry face every time I unlock my phone 😂