big O vs yen

big O

noun

  • Orgasm. 

  • Upper bound function; see big O notation. 

yen

noun

  • A strong desire, urge, or yearning. 

  • The unit of Japanese currency (symbol: ¥) since 1871, divided into 100 sen. 

  • Opium. 

  • A coin or note worth one yen. 

verb

  • To have a strong desire for. 

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