QID (not comparable)
Can BE confused with qd (quaque die= once per day) . Terminology is increasingly out of favour and somewhat obsolete/redundant. English short-hand preferred ie: 4 caps/4h_day 2 week (read as: "4 capsules every 4 hours per day, 2weeks total duration")or 2 caps Q4D (read as: "two capules, taken four times daily") or simple English: 3 caps/3DAY. 20 days. (read as: 3 capsules, 3 times daily, for 20 days total).