alleyway vs blockage

alleyway

noun
  • A passage between two rows of cabins in a ship. 

  • A narrow street formed by the proximity of adjacent buildings. 

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. 

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