freak accident vs trauma

freak accident

noun
  • An incident, especially one that is harmful, occurring under highly unusual and unlikely circumstances. 

trauma

noun
  • An event that causes great distress. 

  • An emotional wound leading to psychological injury. 

  • Any serious injury to the body, often resulting from violence or an accident. 

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