kooky vs off-centre

kooky

adj
  • Eccentric, strange, or foolish; crazy or insane; kookish. 

  • Behaving like a kook (a person with poor style or skill); kook-like. 

off-centre

adj
  • eccentric, unbalanced 

  • (of an axis etc) displaced from the centre 

How often have the words kooky and off-centre occurred in a corpus of books? (source: Google Ngram Viewer )