actual vs imponderable

actual

adj
  • Existing in reality, not just potentially; really acted or acting; occurring in fact. 

  • Used as intensifier to emphasise a following noun; exact, specific, very. 

  • relating to a person's acts or deeds; active, practical 

noun
  • Reality, usually with the definite article. 

  • something actually received; real receipts, as distinct from estimated ones. 

  • a radio callsign modifier that specifies the commanding officer of the unit or asset denoted by the remainder of the callsign and not the officer's assistant or other designee. 

imponderable

noun
  • An imponderable question. 

  • A factor that cannot be anticipated. 

  • An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism. 

adj
  • Not ponderable; without sensible or appreciable weight; incapable of being weighed. 

  • Difficult or impossible to comprehend or evaluate. 

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