expletive vs imprecation

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). 

imprecation

noun
  • A curse. 

  • The act of imprecating, or invoking evil upon someone; a prayer that a curse or calamity may befall someone. 

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