carbon copy vs patterning

carbon copy

verb
  • To send a duplicate copy of an email to. 

  • To create a carbon copy of. 

noun
  • A duplicate copy of an email. 

  • A copy produced in an alternated stack of ordinary sheets of paper and carbon papers. The pressure applied on the top sheet (by a pen or typewriter) causes every carbon paper to release its carbon cover, thus reproducing the writing on the subjacent layers of paper. 

  • Any duplicate. 

patterning

noun
  • Emulation, following as a model; frequently with after. 

  • An assault or act of humiliation that is deliberately filmed to be shared on social media. 

  • A pattern; the production of a pattern; the process of forming a pattern. 

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