compulsion vs fixation

compulsion

noun
  • An irrational need or irresistible urge to perform some action, often despite negative consequences. 

  • The use of authority, influence, or other power to force (compel) a person or persons to act. 

  • The lawful use of violence (i.e. by the administration). 

fixation

noun
  • A state of mind involving obsession with a particular person, idea, or thing. 

  • process by which an injury is rendered immobile. 

  • Recording a creative work in a medium of expression for more than a transitory duration, thereby satisfying the "fixation" requirement for the purposes of copyright law. 

  • The change in a gene pool from a situation where there exists at least two variants of a particular gene (allele) to a situation where only one of the alleles remains. 

  • The act of fixing. 

  • maintaining of the gaze on a single location. 

  • The act of uniting chemically with a solid substance or in a solid form; reduction to a non-volatile condition; -- said of volatile elements. 

  • The state of being fixed or fixated. 

  • The act or process of ceasing to be fluid and becoming firm. 

  • In metals, a state of resistance to evaporation or volatilization by heat. 

  • preservation of biological tissues from decay due to autolysis or putrefaction. 

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