HP vs hit point

HP

noun

  • Hit points; health points. 

name

  • The Hewlett-Packard Company 

  • Harry Potter 

hit point

noun

  • In ray tracing, the point in a scene at which a ray strikes an object. 

  • A unit of damage, used to specify the amount of damage a character or object can withstand before it is defeated or destroyed. 

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