diddy vs small-bore

diddy

adj
  • very small, tiny 

noun
  • A woman's breast. 

  • A fool, a tit. 

  • A gypsy. 

small-bore

adj
  • insignificant or trivial. 

  • Having a small caliber. 

How often have the words diddy and small-bore occurred in a corpus of books? (source: Google Ngram Viewer )