contestation vs sentiment

contestation

noun
  • Proof by witness; attestation; testimony. 

  • The act of contesting; emulation 

sentiment

noun
  • Feelings, especially tender feelings, as apart from reason or judgment, or of a weak or foolish kind. 

  • A general thought, feeling, or sense. 

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