equivalent vs peer

equivalent

verb
  • To make equivalent to; to equal. 

adj
  • Having the equal ability to combine. 

  • Similar or identical in value, meaning or effect; virtually equal. 

  • Of a map, equal-area. 

  • Equal in measure but not admitting of superposition; applied to magnitudes. 

  • Of two sets, having a one-to-one correspondence. 

  • Relating to the corresponding elements of an equivalence relation. 

noun
  • An equivalent weight. 

  • Anything that is virtually equal to something else, or has the same value, force, etc. 

peer

verb
  • To make equal in rank. 

  • To carry communications traffic terminating on one's own network on an equivalency basis to and from another network, usually without charge or payment. Contrast with transit where one pays another network provider to carry one's traffic. 

  • To look with difficulty, or as if searching for something. 

noun
  • Someone who pees, someone who urinates. 

  • Somebody who is, or something that is, at a level or of a value equal (to that of something else). 

  • A look; a glance. 

  • A noble with a title, i.e., a peerage, and in times past, with certain rights and privileges not enjoyed by commoners. 

  • Someone who is approximately the same age (as someone else). 

  • A comrade; a companion; an associate. 

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