gyral vs spinning

gyral

adj
  • Moving circularly or spirally; gyratory; whirling. 

  • Of or pertaining to a gyrus 

spinning

noun
  • The motion of something that spins. 

  • The process of converting fibres into yarn or thread. 

  • Indoor cycling on an exercise bicycle. 

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