imperfect vs present imperfect

imperfect

noun
  • a tense of verbs used in describing a past action that is incomplete or continuous 

  • something having a minor flaw 

verb
  • to make imperfect 

adj
  • not perfect 

  • belonging to a tense of verbs used in describing a past action that is incomplete or continuous 

  • known or expected to be polyphyletic, as of a form taxon. 

  • unisexual: having either male (with stamens) or female (with pistil) flowers, but not with both. 

present imperfect

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

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