atypical vs copybook

atypical

noun
  • An atypical antipsychotic. 

adj
  • Unusual or irregular. 

  • Not conforming to the normal type. 

copybook

noun
  • A series of instructions or data definitions copied into multiple programs from a shared library; boilerplate. 

  • A student's exercise book containing samples of good handwriting to be copied. 

  • A notebook containing blank, often lined, pages for writing answers. 

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