reamer vs xyster

reamer

noun
  • A tool for boring a hole wider. 

  • A tool used to scrape carbon deposit from the bowl of a pipe. 

  • A device for rendering citrus juice. 

  • A Stone Age prehistoric lithic stone tool, used in archeology nomenclature. 

xyster

noun
  • A surgical instrument used to scrape bones. 

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