insignificant vs subalternate

insignificant

adj
  • Not significant; not important, inconsequential, or having no noticeable effect. 

  • Without meaning; not signifying anything. 

subalternate

adj
  • Succeeding by turns; successive. 

  • Subaltern; inferior; subordinate. 

noun
  • A particular proposition, as opposed to a universal one. 

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