septuagenarian vs venerable

septuagenarian

adj
  • Of or related to seventysomethings. 

noun
  • Synonym of seventysomething: a person between 70 and 79 years old. 

venerable

adj
  • Ancient, antiquated or archaic. 

  • Giving an impression of aged goodness and benevolence. 

  • Commanding respect because of age, dignity, character or position. 

  • Made sacred especially by religious or historical association. 

  • Worthy of reverence. 

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