abiding vs imperfective

abiding

noun
  • The action of one who abides; the state of an abider. 

adj
  • Continuing or persisting in the same state: lasting, enduring; steadfast. 

imperfective

noun
  • The imperfective aspect; a verb having this aspect. 

adj
  • Of, relating to or having the properties of the imperfective aspect. 

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