convoluted vs turbinal

convoluted

adj
  • Having numerous overlapping coils or folds; convolute. 

  • Complex, complicated, or intricate. 

turbinal

adj
  • Rolled in a spiral; scroll-like; turbinate; applied to the thin, plicated, bony or cartilaginous plates which support the olfactory and mucous membranes of the nasal chambers. 

  • Having the shape of a cone resting on its apex. 

noun
  • A turbinate bone. 

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