bobbin vs cartouche

bobbin

noun
  • A spool or cylinder around which wire is coiled. 

  • A fine cord or narrow braid. 

  • The little rounded piece of wood at the end of a latch string, which is pulled to raise the latch. 

  • In a sewing machine, the small spool that holds the lower thread. 

cartouche

noun
  • A wooden case filled with balls, to be shot from a cannon. 

  • A paper cartridge. 

  • A gunner's bag for ammunition. 

  • A military pass for a soldier on furlough. 

  • An ornamental figure, often on an oval shield. 

  • An oval figure containing the characters of an important personal name, such as that of royal or divine people. 

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