flesh and blood vs gens

flesh and blood

noun
  • One's family, or member of one's family. 

  • Human nature. 

  • A human body; a person generally. 

adj
  • Real; substantial. 

  • Consisting of flesh, blood, and other substances associated with animals or humans. 

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]) 

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