ancestral vs tribal

ancestral

adj
  • Of, pertaining to, derived from, or possessed by, an ancestor or ancestors 

tribal

adj
  • Of or relating to tribes. 

  • Based on or organized according to tribes. 

noun
  • A member of a tribe. 

  • A design or image that has been influenced by indigenous peoples; especially such a tattoo. 

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