crude vs imperfect

crude

adj
  • Lacking tact or taste. 

  • In a natural, untreated state. 

  • Characterized by simplicity, especially something not carefully or expertly made. 

  • Lacking concealing elements. 

  • Pertaining to the uninflected stem of a word. 

noun
  • Any substance in its natural state. 

  • Crude oil. 

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. 

noun
  • something having a minor flaw 

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

verb
  • to make imperfect 

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