cover-up vs speciousness

cover-up

noun
  • An attempt to conceal or disguise something, especially a wrongdoing or a mistake. 

  • An item of clothing to be worn over a swimsuit while not in the water. 

speciousness

noun
  • The result or product of being specious. 

  • The state or quality of being specious. 

How often have the words cover-up and speciousness occurred in a corpus of books? (source: Google Ngram Viewer )