registered trademark vs significant

registered trademark

noun
  • A trademark that has been officially registered with the government by its owner. Indicated by the symbol ®. 

significant

noun
  • That which has significance; a sign; a token; a symbol. 

adj
  • Reasonably large in number or amount. 

  • Having a low probability of occurring by chance (for example, having high correlation and thus likely to be related). 

  • Having a covert or hidden meaning. 

  • Having a noticeable or major effect. 

  • Signifying something; carrying meaning. 

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