aristo vs peeress

aristo

noun
  • An aristocrat 

  • A wealthy man, especially married, who has sexual affairs with much younger women and spends money on them 

peeress

noun
  • A woman holding a noble title in her own right. 

  • A noblewoman married to a peer. 

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