reparative vs unhelpable

reparative

adj
  • Tending to or intended to repair. 

  • Of, pertaining to, or being a reparation. 

noun
  • That which repairs. 

unhelpable

adj
  • Incapable of being helped. 

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