codomain vs locus

codomain

noun
  • The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y. 

locus

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

  • 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. 

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

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