disunited vs symbiotic

disunited

adj
  • Lacking unity; not united. 

symbiotic

noun
  • symbiotic star 

adj
  • Of, or relating to symbiosis; living together. 

  • Of a relationship with mutual benefit between two individuals or organisms. 

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