slyness vs sophistry

slyness

noun
  • The state or quality of being sly. 

  • The result or product of being sly. 

sophistry

noun
  • Plausible yet fallacious argumentations or reasoning. 

  • The actions or arguments of a sophist. 

  • An argument that seems plausible, but is fallacious or misleading, especially one devised deliberately to be so; a sophism. 

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