delayer vs loper

delayer

noun
  • One who delays. 

  • A substance that is used to slow the rate of combustion of a solid rocket fuel so as to make it more controllable 

verb
  • To remove layers from; to strip away levels from. 

loper

noun
  • One who or that which lopes; a runner; a leaper. 

  • A wolf, especially a grey or timber wolf. 

  • A swivel placed at one end of the ropewalk, with the whirl being at the opposite end. 

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