hardcore vs hotfoot

hardcore

adj
  • Faster or more intense than the regular style. 

  • Having an extreme dedication to a certain activity. 

  • Particularly intense; thrillingly dangerous or erratic; desirably violent in appearance; pleasing or "cool" due to intensity or danger. 

  • Resistant to change. 

  • Depicting penetration and abnormal sexual activity. 

  • Obscene or explicit. 

noun
  • Outlaw country. 

  • Jungle. 

  • Gangsta rap. 

  • Broken bricks, stone and/or other aggregate used as foundations, especially in road and path laying. 

  • Hardcore punk. 

  • Hardcore techno. 

hotfoot

adj
  • Moving with haste or zeal. 

adv
  • Hastily; without delay. 

verb
  • To run (a distance). 

noun
  • The prank of secretly inserting a match between the sole and upper of a victim's shoe and then lighting it. 

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