contenement vs opportunity

contenement

noun
  • That which is connected with a tenement, or thing holden, as a certain quantity of land adjacent to a dwelling, and necessary to the reputable enjoyment of the dwelling. 

  • That which is held together with another thing. 

opportunity

noun
  • A favorable circumstance or occasion. 

  • opportuneness 

  • A chance for advancement, progress or profit. 

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