goody-goody vs sneak

goody-goody

noun
  • A well-behaved person with no obvious human failings, with the possible exception of smugness and self-satisfaction. 

adj
  • Mawkishly good; weakly benevolent or pious. 

sneak

verb
  • To stealthily bring someone something. 

  • To inform an authority of another's misdemeanours. 

  • To creep or go stealthily; to come or go while trying to avoid detection, as a person who does not wish to be seen. 

  • To take something stealthily without permission. 

noun
  • A cheat; a con artist. 

  • An informer; a tell-tale. 

  • The act of sneaking 

  • A sneaker; a tennis shoe. 

  • One who sneaks; one who moves stealthily to acquire an item or information. 

  • A play where the quarterback receives the snap and immediately dives forward. 

adj
  • In advance; before release to the general public. 

  • In a stealthy or surreptitious manner. 

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