at nine o'clock vs sinistral

at nine o'clock

sinistral

adj
  • Having left lateral fault movement. 

  • Of, facing, or on the left side. 

  • Left-handed. 

  • Having the whorls of the spire revolving or rising to the left; reversed. 

noun
  • A left-handed individual. 

How often have the words at nine o'clock and sinistral occurred in a corpus of books? (source: Google Ngram Viewer )