There are two common ways you can say "for 2 years." You can say 2년 동안 or 2년간. The second uses the Hanja 間 (간). But then what's the difference between these two uses? And what's the difference between the words 間 (간) and 동안?
I made a short video covering 間 (간) and how to use it, in this week's "Korean FAQ" episode.