A:Have you got the medicine yet ? B: Yes , I've been given so much , that I simply don't know what to do with it all . A: Well , these are for internal use.You take a packet each time.Four times a day . B: What about these ? A: They're painkillers.You take one tablet when you feel a pain , but not more than once within <MASK> . B: I see.Thank you , doctor .
four hours four minutes one week