multiethnic vs supranational

multiethnic

adj
  • Of, pertaining to, or consisting of several ethnic groups. 

noun
  • A member of more than one ethnic group. 

supranational

adj
  • Beyond the borders or scope of any one nation. 

noun
  • Such a person or organization. 

How often have the words multiethnic and supranational occurred in a corpus of books? (source: Google Ngram Viewer )