amenable vs relentless

amenable

adj
  • Liable to be brought to account, to a charge or claim; responsible; accountable; answerable. 

  • Willing to respond to persuasion or suggestions. 

  • Being a locally compact topological group carrying a kind of averaging operation on bounded functions that is invariant under translation by group elements. 

  • Willing to comply; easily led. 

  • Liable to the legal authority of (something). 

relentless

adj
  • Unrelenting or unyielding in severity. 

  • Unremitting, steady and persistent. 

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