Not so common (4)
I believe the answer is:
rare
(Other definitions for rare that I've seen before include "not often spotted" , "Very scarce and probably valuable" , "Seldom - unusual" , "Seldom encountered" , "Infrequent; remarkable" .)
I believe the answer is:
rare
(Other definitions for rare that I've seen before include "not often spotted" , "Very scarce and probably valuable" , "Seldom - unusual" , "Seldom encountered" , "Infrequent; remarkable" .)