joining vs symbiotic

joining

noun
  • The act or result of joining; a joint or juncture. 

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