mon vs ninja

mon

noun
  • A colloquial means of address of man in places such as Jamaica and Shropshire in England. 

  • A creature in a video game, usually one which is captured, trained up and used in battles. 

  • A video game or anime in which catching and battling creatures is an important element. 

  • The former currency of Japan until 1870, before the yen. 

  • The badge or emblem of a Japanese family, especially a family of the ancient feudal nobility; typically circular and consists of conventionalized forms from nature. 

ninja

noun
  • Synonym of man as a friendly term of address. 

  • A person considered to look like the historical ninja in some way, including (Mongolia, historical slang) amateur private miners. 

  • A person trained in ninjutsu, especially (historical) one used for espionage, assassination, and other tasks requiring stealth during Japan's shogunate period. 

  • A person considered similarly skillful to the historical ninja, especially in covert or stealthy operation. 

adj
  • Of or related to ninjas in their various senses. 

verb
  • Synonym of preempt: to supersede and invalidate a response by posting immediately before it. 

  • To act or move like a ninja, particularly with regard to a combination of speed, power, and stealth. 

  • To claim an item through abuse of game mechanics. 

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