Korean phrase
~ 언제까지 사용하나요? ~ eon je kka ji sa yong ha na yo
Meaning
How long do you use ___?
When to use it
This politely asks how long something should be used. It is an everyday question for checking the proper length of use, such as for an ointment.
Example dialogue
이 연고를 언제까지 사용하나요? i yeon go reul eon je kka ji sa yong ha na yo
How long should I use this ointment?
증상이 사라질 때까지 바르세요. cheung sang i sa ra jil ttae kka ji pa reu se yo
Apply it until the symptoms disappear.