gens vs nation

gens

noun
  • A legally defined unit of Roman society, being a collection of people related through a common ancestor by birth, marriage or adoption, possibly over many generations, and sharing the same nomen gentilicium. 

  • A tribal subgroup whose members are characterized by having the same descent, usually along the male line. 

  • A host-specific lineage of a brood parasite species.^([W]) 

nation

noun
  • A historically constituted, stable community of people, formed based on a common language, territory, economic life, ethnicity and/or psychological make-up manifested in a common culture. 

  • Damnation. 

  • A sovereign state. 

  • An association of students based on its members' birthplace or ethnicity. 

adv
  • Extremely, very. 

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