nǐ nǎlǐ bù shūfu?
What hurts you?
一天三次。
Take three times daily
一天 (yì tiān) means 'one day', 三 (sān) means 'three', and 次 (cì) is a measure word for times. The phrase literally means 'one day three times' and is understood as 'take three times a day' in context.
每天三次
měi tiān sān cì
Three times every day — More conversational, emphasizes 'every day'.
一天吃三次
yī tiān chī sān cì
Eat three times a day — Specifies the action (to eat), more concrete.
我应该一天三次吃药吗?
Wǒ yīnggāi yī tiān sān cì chī yào ma?
Should I take the medicine three times a day?
是的,医生建议你这样做。
Shì de, yīshēng jiànyì nǐ zhèyàng zuò.
Yes, the doctor recommends you do that.
Appropriate
Avoid when
You say '一天三次' (yì tiān sān cì). It literally means 'one day three times' and is used for dosage instructions.
It is pronounced 'yì tiān sān cì'. Note that 一 changes to the fourth tone yì before the first tone tiān.
Use it when talking about how often to take medicine or do something three times daily. It's common in medical contexts.
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