modest vs pure as driven snow

modest

adj
  • Intending to avoid the encouraging of sexual attraction in others. 

  • Not bragging or boasting about oneself or one's achievements; unpretentious, humble. 

  • Pure and delicate from a sense of propriety. 

  • Small, moderate in size. 

pure as driven snow

How often have the words modest and pure as driven snow occurred in a corpus of books? (source: Google Ngram Viewer )