What does a 1/6 chase variant mean?

A chase is a rarer alternate version of a figure, typically packed at roughly 1-in-6 odds. Listings such as the Kaiju No.8, Sandman, Robocop and Kpop Demon Hunters figures advertise chase odds, but buyers should understand they are far more likely to receive the common version than the chase, a point worth weighing before paying a premium.