alteration vs stagnation

alteration

noun
  • The act of altering or making different. 

  • The state of being altered; a change made in the form or nature of a thing; a changed condition. 

stagnation

noun
  • Inactivity. 

  • The state of being stagnant, without circulation. 

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