inanity vs prosaicism

inanity

noun
  • The property of being inane, of lacking material of interest or satisfaction, emptiness. 

  • Something that is inane. 

prosaicism

noun
  • The quality or state of being prosaic; a prosaic manner or style. 

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