constrainment vs inverse limit

constrainment

noun
  • Synonym of constraint 

inverse limit

noun
  • a limit 

  • A subset of the Cartesian product of all the members of an inverse system, such that a member M of the subset is a sort of “cross section” of the inverse system (as fiber bundle) induced by the morphisms of it. (If i search related words by phrase or description.

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