180 vs clxxx

180

noun
  • The friendly welcome was a 180 from what she had been expecting 

  • The exact opposite. 

  • A complete change of direction or opinion. 

  • An instance of spinning 180 degrees, so that one is facing in the opposite direction. 

clxxx

How often have the words 180 and clxxx occurred in a corpus of books? (source: Google Ngram Viewer )