fink vs tattletale

fink

verb
  • To betray a trust; to inform on. 

noun
  • An informer. 

  • A strikebreaker. 

  • A contemptible person. 

  • Any of several birds in the family Ploceidae native to southern Africa. 

tattletale

verb
  • To act as a tattletale; to tell on; to give away, reveal, or expose. 

noun
  • One who tattles (reports others' wrongdoings), often a child seeking attention. 

  • One who gossips, often for the sake of attention. 

adj
  • telltale; giveaway 

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