displacement vs migration

displacement

noun
  • The act of displacing, or the state of being displaced; a putting out of place. 

  • A vector quantity which denotes distance with a directional component. 

  • The quantity of a liquid displaced by a floating body, as water by a ship, the weight of the displaced liquid being equal to that of the displacing body. 

  • The capability of a communication system to refer to things that are not present (that existed or will exist at another time, or that exist at another location). 

  • Moving the target to avoid an attack; dodging. 

  • The process of extracting soluble substances from organic material and the like, whereby a quantity of saturated solvent is displaced, or removed, for another quantity of the solvent. 

migration

noun
  • An instance of moving to live in another place for a while. 

  • Instance of changing a platform from an environment to another one. 

  • The movement of cells in particular directions to specific locations. 

  • Movement in general. 

  • Seasonal moving of animals, as mammals, birds or fish, especially between breeding and non-breeding areas. 

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