ear lobe vs whetstone

ear lobe

noun
  • The fleshy patch of skin below the ear tuft of a chicken. 

  • The lower, exterior, fleshy, bulbous part of the human ear. 

whetstone

noun
  • A stimulant. 

  • A benchmark for evaluating the power and performance of a computer. 

  • A sharpening stone; a hard stone or piece of synthetically bonded hard minerals that has been formed with at least one flat surface, used to sharpen or hone an edged tool. 

verb
  • To sharpen with a whetstone. 

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