obvolute vs tortuous

obvolute

adj
  • overlapping; contorted; convoluted 

  • Having two opposite leaves, each with one edge overlapping the nearest edge of the other. 

  • Having a circle of several leaves or petals which overlap in that manner. 

tortuous

adj
  • Twisted; having many turns; convoluted. 

  • Oblique; applied to the six signs of the zodiac (from Capricorn to Gemini) that ascend most rapidly and obliquely. 

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