helpful vs snide

helpful

adj
  • Furnishing help; giving aid; useful. 

snide

noun
  • An underhanded, tricky person given to sharp practice; a sharper; a cheat. 

  • Counterfeit money. 

adj
  • Tricky; deceptive; false; spurious; contemptible. 

  • Disparaging or derisive in an insinuative way. 

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