concerted vs symbiotic

concerted

adj
  • Having separate parts for voices and instruments. 

  • Performed through a concert of effort; done by agreement or in combination. 

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 concerted and symbiotic occurred in a corpus of books? (source: Google Ngram Viewer )