superhuman vs superstar

superhuman

noun
  • A human being with remarkable abilities or superpowers. 

adj
  • Beyond what is possible for a human being. 

superstar

noun
  • Someone who has accumulated a vast amount of fame; a high-level celebrity. 

  • A giant star. 

  • An exceptionally productive employee. 

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