insignificant vs leading

insignificant

adj
  • Not significant; not important, inconsequential, or having no noticeable effect. 

  • Without meaning; not signifying anything. 

leading

noun
  • Vertical space added between lines; line spacing. 

  • An act by which one is led or guided. 

adj
  • Providing guidance or direction. 

  • Occurring in advance; preceding. 

  • Ranking first. 

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