jigsaw vs singing saw

jigsaw

noun

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

  • Something that can be compared to a jigsaw puzzle. 

  • A jigsaw puzzle. 

verb

  • To cut something using a jigsaw. 

singing saw

noun

  • musical saw 

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