coexistent vs subalternate

coexistent

noun
  • That which coexists with another. 

adj
  • existing at the same time as something else 

subalternate

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

adj
  • Succeeding by turns; successive. 

  • Subaltern; inferior; subordinate. 

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