off-the-wall vs offbeat

off-the-wall

adj
  • Wildly unconventional; bizarre; absurd. 

  • Of a person's behaviour: greatly inappropriate. 

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 off-the-wall and offbeat occurred in a corpus of books? (source: Google Ngram Viewer )