nth vs obscure

nth

adj
  • Occurring at a relatively large but unspecified position in a series. 

  • Occurring at position n in a sequence. 

noun
  • The item at position n in a sequence. 

  • The item in a relatively large but unspecified position in a series. 

obscure

adj
  • Hidden, out of sight or inconspicuous. 

  • Dark, faint or indistinct. 

  • Difficult to understand. 

  • Not well-known. 

  • Unknown or uncertain; unclear. 

verb
  • To hide, put out of sight etc. 

  • To render obscure; to darken; to make dim; to keep in the dark; to hide; to make less visible, intelligible, legible, glorious, beautiful, or illustrious. 

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