frivolous vs inconsequential

frivolous

adj
  • Of little weight or importance; not worth notice; slight; trivial. 

  • Having no reasonable prospect of success because its claim is without merit, lacking a supporting legal or factual basis, while the filing party is, or should be, aware of this. 

  • Silly, especially at an inappropriate time or in an inappropriate manner. 

inconsequential

adj
  • Having no consequence; not consequential; of little importance. 

  • Not logically following from the premises. 

noun
  • Something unimportant; something that does not matter. 

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