dotage vs senility

dotage

noun
  • Decline in judgment and other cognitive functions, associated with aging; senility. 

  • Fondness or attentiveness, especially to an excessive degree. 

  • Foolish utterance(s); drivel. 

senility

noun
  • The losing of memory and reason due to senescence. 

  • Senescence; the bodily and mental deterioration associated with old age. 

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