Barb vs Ivory

Barb

name

  • A diminutive of the female given name Barbara. 

  • A surname. 

noun

  • A fan of the American singer Nicki Minaj, especially a female one. 

Ivory

name

  • A female given name from English. 

  • A surname from Old French. 

  • A male given name from English. 

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