jigsaw vs stumper

jigsaw

noun
  • A jigsaw puzzle. 

  • Something that can be compared to a jigsaw puzzle. 

  • A power saw with fine teeth and a narrow blade which can cut curves in wood or metal. 

verb
  • To cut something using a jigsaw. 

stumper

noun
  • A difficult puzzle or problem. 

  • One who stumps, or speaks, or orates, as a politician. 

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