convolute vs obvolute

convolute

adj
  • Convoluted. 

  • Coiled such that one edge is inside, and one outside the coil, giving a spiral effect in cross section. 

verb
  • To confuse, mix up (something) with something else. 

  • To make unnecessarily complex. 

  • To fold or coil into numerous overlapping layers. 

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. 

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