delayer vs lagger

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. 

lagger

noun
  • One who or that which lags behind; a laggard. 

  • A player who lags (has a poor or slow network connection). 

  • A marker used in the game of hopscotch. 

  • A member of support staff responsible for contacting lawyers to check how a case is progressing. 

  • One who installs lagging. 

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