insipidity vs prosaicness

insipidity

noun
  • The condition of being insipid; insipidness. 

  • Something that is insipid; an insipid utterance, sight, object, etc. 

prosaicness

noun
  • The characteristic of being prosaic. 

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