There is no direct antonym for the phrase "most thousand-and-one", which means "a large number" or "countless". However, some phrases that could be used as an opposite in certain contexts include "few", "scarce", "limited", or "rare". These words imply a small or restricted quantity, which is the opposite of "most thousand-and-one". For example, if someone asked how many options there were for a particular task, the opposite of "most thousand-and-one" could be "limited" or "few". Similarly, if someone asked how often they should perform a certain task, the opposite of "most thousand-and-one" could be "rare".