off-the-wall vs usual

off-the-wall

adj
  • Wildly unconventional; bizarre; absurd. 

  • Of a person's behaviour: greatly inappropriate. 

usual

adj
  • Most commonly occurring; typical. 

noun
  • A specific good or service (e.g. a drink) that someone typically orders. 

  • The typical state of something, or something that is typical. 

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