symbiotic vs unconstructive

symbiotic

noun
  • symbiotic star 

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

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

unconstructive

adj
  • Not constructive; unhelpful. 

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