leading vs unfamiliar

leading

adj
  • Providing guidance or direction. 

  • Occurring in advance; preceding. 

  • Ranking first. 

noun
  • Vertical space added between lines; line spacing. 

  • An act by which one is led or guided. 

unfamiliar

adj
  • Strange, not familiar. 

noun
  • An unfamiliar person; a stranger. 

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