kooky vs offbeat

kooky

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

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

offbeat

adj
  • Unusual; unconventional; not ordinary. 

noun
  • The beats not normally accented in a measure. 

  • An unconventional person, someone who does not follow the beat, who chooses not to conform. 

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