monogamous vs polygamous

monogamous

adj
  • Monogamic; having a simple flower with united anthers. 

  • Being married to one person at a time. 

  • Having only one sexual partner at a time. 

polygamous

adj
  • Exhibiting polygamy. 

  • Of, relating to, or practicing polygamy. 

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