+ if duration >= MINUTE
+ minutes = (duration / MINUTE).floor
+ duration -= minutes * MINUTE
+ end
+
+ seconds = duration.floor
+
+ if round_to_min and seconds >= 30
+ minutes += 1
+ end
+
+ if use_words
+ s = []
+ if days > 0 then
+ s << "#{days} day#{'s' if days != 1}"
+ end