precarious vs tricky

precarious

adj
  • Dangerously insecure or unstable; perilous. 

  • Relating to incipient caries. 

  • Depending on the intention of another. 

tricky

adj
  • hard to deal with, complicated 

  • Relating to or associated with a prostitution trick 

  • adept at using deception 

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