doormat vs doter

doormat

noun
  • Someone who is overly submissive to others' wishes. 

  • A coarse mat at the entrance to a house, upon which one wipes one's shoes. 

doter

noun
  • Synonym of dotard (“one who dotes on another, showing excessive fondness”) 

  • Synonym of dotard (“old person with impaired intellect”) 

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