crude vs injective

crude

adj
  • Pertaining to the uninflected stem of a word. 

  • In a natural, untreated state. 

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

  • Lacking tact or taste. 

  • Lacking concealing elements. 

noun
  • Any substance in its natural state. 

  • Crude oil. 

injective

adj
  • of, relating to, or being an injection: such that each element of the image (or range) is associated with at most one element of the preimage (or domain); inverse-deterministic 

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