Hey, maybe I am to blind to find this but I think it isn't possible atm. I would suggest to add an option to the stats panel to see the overall number of terms on a certain mastery level for kanji and vocabulary. Atm it only shows the total number of mastery stars. To me tbh that doesn't really motivate me. I'd rather like to know (like I can already see for the schedules separately) how many terms are on what level exactly. :)