Why not? Can’t promise any particular frequency, though once a week is doable. Keeping a daily journal in Korean has helped me master words I use everyday, words that are close to my mind and heart. Maybe I can’t always keep up in every simple conversation, but I can express my tastes and desires with greater confidence and frequency. The obscure and archaic words I learn from the Handbook of Korean Vocabulary are the ones I have no trouble remembering. Actually, I have little trouble remembering most words these days: looking up something using my phone dictionary today, I remembered the word and a cousin word after looking at them each once. Now that’s progress.