blackthorn vs truncheon

blackthorn

noun
  • A stick or staff taken from this tree. 

  • A large shrub or small tree, Prunus spinosa, that is native to Europe, western Asia, and north Africa. It has a dark bark and bears thorns. 

truncheon

noun
  • A baton, or military staff of command, now especially the stick carried by a police officer. 

  • A short staff, a club; a cudgel. 

  • A penis. 

verb
  • To strike with a truncheon. 

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