besom vs libero

besom

noun
  • A broom made from a bundle of twigs tied onto a shaft. 

  • Any cleansing or purifying agent. 

  • A troublesome woman. 

libero

noun
  • a sweeper 

  • a designated back-row player intended to be used as a ball-control specialist 

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