expletive vs insulting

expletive

noun
  • A profane, vulgar term, notably a curse or obscene oath. 

  • A word without meaning added to fill a syntactic position. 

  • A word that adds to the strength of a phrase without affecting its meaning. 

adj
  • Serving to fill up, merely for effect, otherwise redundant. 

  • Marked by expletives (phrase-fillers). 

insulting

noun
  • The act of giving insult. 

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

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