recycle vs regen

recycle

verb
  • To be recycled. 

  • To discard into a recycling bin. 

  • To put (a person) through a course of training again. 

  • To skate toward the rear of the engagement zone to maximize the time that an opposing jammer must spend before returning to the action. 

  • To collect or place in a bin for recycling. 

  • To break down and reuse component materials. 

  • To reuse as a whole. 

noun
  • An act of recycling. 

regen

verb
  • To regenerate. 

noun
  • A regenerative radio receiver. 

  • Regeneration. 

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