irregularity vs strangeness

irregularity

noun
  • An object or event that is not regular or ordinary. 

  • A violation of rules. 

  • An instance of being irregular. 

  • Irregular bowel movement (e.g. diarrhea or constipation). 

  • The state or condition of being irregular, or the extent to which something is irregular. 

strangeness

noun
  • The state or quality of being strange, odd or weird. 

  • The product or result of being strange. 

  • One of the quantum numbers of subatomic particles, depending upon the relative number of strange quarks and anti-strange quarks. 

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