imperforate vs insulting

imperforate

adj
  • Synonym of atretic 

  • Not perforated, as 

noun
  • A postage stamp that has not been perforated. 

insulting

adj
  • Containing insult, or having the intention of insulting. 

noun
  • The act of giving insult. 

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