doggy style vs doggy-style

doggy style

adj

  • With one partner on all fours and the other penetrating from behind. 

noun

  • The position assumed for doggy style intercourse. 

adv

  • In a position whereby one partner is on all fours and the other partner is penetrating from behind. 

doggy-style

verb

  • To have sex doggystyle 

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