bona fide vs single-hearted

bona fide

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

  • Genuine; not counterfeit. 

adv
  • In good faith; genuinely, sincerely. 

single-hearted

adj
  • Having an honest heart; straightforward, free from duplicity. 

  • Devoted; unambivalent and dedicated. 

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