tocsin vs uvula

tocsin

noun
  • A bell used to sound an alarm. 

  • An alarm or other signal sounded by a bell or bells, originally especially with reference to France. 

uvula

noun
  • an object so suspended inside a bell that it may hit the bell and cause it to ring; a clapper 

  • the slight elevation in the mucous membrane immediately behind the internal urethral orifice of the urinary bladder, caused by the middle lobe of the prostate 

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