fond vs simplex

fond

adj
  • Indulgent. 

  • Affectionate. 

  • Having a liking or affection (for). 

  • Outlandish; foolish; silly. 

noun
  • Brown residue in pans from cooking meats and vegetables. 

  • A group of records having shared provenance. 

  • The background design in lace-making. 

simplex

adj
  • Unidirectional. 

  • Single, simple; not complex. 

noun
  • A monomorphemic word, one without affixes. 

  • An analogue in a space of arbitrary dimensionality of the triangle or tetrahedron; the convex hull of n+1 linearly independent points in n-dimensional space; in other words, the triangle, tetrahedron etc., generalized to an arbitrary number of dimensions. 

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