locus vs orientation

locus

noun
  • A place or locality, especially a centre of activity or the scene of a crime. 

  • A fixed position on a chromosome that may be occupied by one or more genes. 

  • The set of all points whose coordinates satisfy a given equation or condition. 

  • A passage in writing, especially in a collection of ancient sacred writings arranged according to a theme. 

orientation

noun
  • The relative physical position or direction of something. 

  • The construction of a Christian church to have its aisle in an east-west direction with the altar at the east end. 

  • The determination of the relative position of something or someone. 

  • Events to orient new students at a school; events to help new students become familiar with a school. 

  • The choice of which ordered bases are "positively" oriented and which are "negatively" oriented on a real vector space. 

  • The ability to orient, or the process of so doing. 

  • An adjustment to a new environment. 

  • The direction of print across the page; landscape or portrait. 

  • The designation of a parametrised curve as "positively" or "negatively" oriented (or "nonorientable"); the analogous description of a surface or hypersurface. 

  • An introduction to a (new) environment. 

  • An inclination, tendency or direction. 

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