inference vs proofreading

inference

noun
  • The act or process of inferring by deduction or induction. 

  • That which is inferred; a truth or proposition drawn from another which is admitted or supposed to be true; a conclusion; a deduction. 

proofreading

noun
  • The act or process by which a document is proofread. 

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