blockage vs facilitation

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. 

facilitation

noun
  • The process of synapses becoming more capable of transmitting the same type of signal each time certain types of sensory signals pass through sequences of these synapses. 

  • The act of facilitating or making easy. 

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