blockage vs transformation

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. 

transformation

noun
  • The alteration of a bacterial cell caused by the transfer of DNA from another, especially if pathogenic. 

  • The replacement of the variables in an algebraic expression by their values in terms of another set of variables; a mapping of one space onto another or onto itself; a function that changes the position or direction of the axes of a coordinate system. 

  • The transition from the apartheid era to a multiracial democracy in South Africa. 

  • A marked change in appearance or character, especially one for the better. 

  • The act of transforming or the state of being transformed. 

  • A rule that systematically converts one syntactic form into another; a sentence derived by such a rule. 

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