convenient vs symbiotic

convenient

adj
  • Suspicious due to suiting someone's purposes very well. 

  • Serving to reduce a difficulty, or accessible with minimum difficulty; expedient. 

symbiotic

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

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

noun
  • symbiotic star 

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