rock hard vs thirsty

rock hard

adj
  • Having a very fully erect and stiff penis 

  • With strongly held beliefs and opinions, deep conviction. 

  • As tough, hard, or inflexible as a piece of rock. 

  • With muscles developed and toned to a high degree, especially the muscles of the abdomen. 

thirsty

adj
  • Desiring sex. 

  • Causing thirst; giving one a need to drink (informal). 

  • Needing to drink. 

  • Craving something. 

noun
  • Thirst. 

  • One who is thirsty (for a drink, sex, alcohol, etc.). 

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