imperfect vs preterite

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. 

preterite

noun
  • A grammatical tense or verb form serving to denote events that took place or were completed in the past. 

adj
  • Belonging wholly to the past; passed by. 

  • showing an action at a determined moment in the past. 

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