indivisible vs separable

indivisible

noun
  • An infinitely small quantity which is assumed to admit of no further division. 

  • That which cannot be divided or split. 

adj
  • Incapable of being divided; atomic. 

  • Incapable of being divided by a specific integer without leaving a remainder. 

separable

adj
  • Able to be separated. 

  • Able to be brought to a form where all occurrences of the dependent and the independent variable are on opposite sides of the equal sign. 

  • Having a countable dense subset. 

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