blender vs firkin

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. 

firkin

noun
  • A small wooden vessel or cask of indeterminate size, used for butter, lard, etc. 

  • A varying measure of capacity, usually being a quarter of a barrel; specifically, a measure equal to nine imperial gallons. 

  • A weight measure for butter, equalling 56 pounds. 

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