drug fiend vs wacko

drug fiend

noun

  • Someone who is obsessed or crazed in their obsession with drugs and/or drug use. 

wacko

noun

  • An amusingly eccentric or irrational person. 

adj

  • Amusingly eccentric or irrational. 

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