tar baby vs zot

tar baby

noun
  • A black person. 

  • A difficult, abstract problem that worsens as one attempts to handle it; a "sticky" situation, especially one where attempts to make it better only make it worse. 

zot

noun
  • A black person. 

  • An anteater. 

verb
  • To zap, kill, or destroy. 

intj
  • The characteristic sound made by an anteater's tongue or by lightning. 

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