incomplete vs present imperfect

incomplete

noun
  • A designation of being incomplete. 

  • A multipart file posted to Usenet that is incomplete and thus unusable. 

  • A multiplayer game that is abandoned because one player disconnects. 

adj
  • Not complete; not finished 

  • Of a flower, wanting any of the usual floral organs. 

present imperfect

noun
  • A grammatical tense which presents the action in the present as continuous, not yet over 

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