blender vs thresher

blender

noun
  • A machine with sharp rotating blades in a bowl, for mashing, crushing, or liquefying food ingredients. 

  • A piece of fabric sewn into the front of a theatrical wig to make it blend in with the performer's natural hair. 

  • A subtly patterned fabric printed in different shades of a single color, often used in place of a solid to create visual texture. 

thresher

noun
  • A modern farm machine for threshing grain, now a part of combine harvesters rather than a separate implement. 

  • Anything or anyone that threshes. 

  • A now-obsolete hand tool for threshing, also called a flail. 

  • Any of several large pelagic sharks of the genus Alopias, which have a very long tail; more commonly called thresher sharks. 

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