Barb vs Bobby

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. 

Bobby

name

  • A diminutive of the female given name Roberta. 

  • A diminutive of the male given name Robert. 

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