Learn the particle 마다 to say that something happens every time, or that each person or place is different.
By the end, you can attach 마다 to a noun to talk about your routines (아침마다, 주말마다, 두 시간마다) and to say "each one" (나라마다), and you can choose correctly between 매일 and 날마다.
Downloads are for signed-in learners — it takes a minute and it is free.