big O vs ope

big O

noun

  • Upper bound function; see big O notation. 

  • Orgasm. 

ope

noun

  • alley or narrow passage e.g. Tonkin's Ope 

intj

  • an exclamation of surprise; oops 

adj

  • Open. 

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