easy vs simplex

easy

adj
  • Free from constraint, harshness, or formality; unconstrained; smooth. 

  • Consenting readily to sex. 

  • Requiring little skill or effort. 

  • Comfortable; at ease. 

  • Causing ease; giving comfort, or freedom from care or labour. 

  • Not making resistance or showing unwillingness; tractable; yielding; compliant. 

noun
  • Something that is easy. 

verb
  • Synonym of easy-oar 

adv
  • In a relaxed or casual manner. 

  • In a manner without strictness or harshness. 

  • At the very least. 

simplex

adj
  • Single, simple; not complex. 

  • Unidirectional. 

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 easy and simplex occurred in a corpus of books? (source: Google Ngram Viewer )