blockage vs symbiosis

blockage

noun
  • Synonym of constipation (“impairment of feces passage”). 

  • The thing that is the cause of such a state, blocking a passage. 

  • The state or condition of being blocked. 

  • Synonym of thrombosis, synonym of thromboembolism, or synonym of embolism. 

symbiosis

noun
  • The occurrence of two different or opposing things in the same time and place. 

  • A close, prolonged association between two or more organisms of different species, regardless of benefit to the members. 

  • A close, prolonged association between two or more organisms of different species that normally benefits both members. An interspecies cooperation. 

  • The state of people of different types, races, cultures, communities, etc., living together. 

  • A relationship of mutual benefit, especially among different species. 

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