senescent vs venerable

senescent

adj
  • Characteristic of old age. 

  • That ceases to divide. 

  • Growing old; decaying with the lapse of time. 

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 senescent and venerable occurred in a corpus of books? (source: Google Ngram Viewer )