안녕하세요 I am a very, very beginner Korean learner. Everything about this language is new to me. I am excited to learn the language and culture, and I enjoy talking about how Koreans live. My italki teacher, Hoensoo Shin, is a great support for me. He teaches me words and phrases that are not in the textbook. That's how I learned 자나 깨나. I don't know why, but I love this expression. It tastes good to me, it sits well on my tongue. And most importantly, it is simple enough that even at my level I can use it. 자나깨나 - night and day, day and night, twenty-four seven (EN) 자나깨나 - dniem i nocą, na jawie i we śnie (PL) 자나 (자다), 깨나 (깨다) Naver - https://korean.dict.naver.com/koendict/#/entry/koen/7a9b5423a15942f2b9b374f4f0df6b30