Patient: I have a cough.
Doctor: When did it start?
Patient: Four days ago.
Doctor: Do you have any other symptoms?
Patient: I have a fever.
Doctor: Let me look at your chest. I'm going to give you a prescription for cough syrup.
Patient: How much do I take?
Doctor: Take one teaspoon every four hours. You will feel better in a few days.
Patient: One teaspoon every four hours. Thank you.