bona fide vs spurious

bona fide

adj
  • Genuine; not counterfeit. 

  • In good faith; sincere; without deception or ulterior motive. 

adv
  • In good faith; genuinely, sincerely. 

spurious

adj
  • False, not authentic, not genuine. 

  • Extraneous; stray; not relevant or wanted. 

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