blockage vs passageway

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. 

passageway

noun
  • Any way for passing in, out or through something. 

  • A covered walkway, between rooms or buildings. 

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