fixation vs regression

fixation

noun
  • The state of being fixed or fixated. 

  • 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 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. 

regression

noun
  • An action of regressing, a return to a previous state. 

  • An analytic method to measure the association of one or more independent variables with a dependent variable. 

  • The reappearance of a bug in a piece of software that had previously been fixed. 

  • An equation using specified and associated data for two or more variables such that one variable can be estimated from the remaining variable(s). 

  • The making an exercise less straining to perform by manipulating the details of its performance like loaded weight, range of motion, angle, speed. 

  • The diminishing of a cellular mass like a tumor, or of an organ size. 

  • A psychotherapeutic method whereby healing is facilitated by inducing the patient to act out behaviour typical of an earlier developmental stage. 

  • An action of travelling mentally back in time. 

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