dallier vs trifler

dallier

noun
  • One who dallies; a procrastinator. 

trifler

noun
  • One who trifles, or treats something as inconsequential. 

  • A pewterer who produced small pewter utensils such as salt cellars. 

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