convoluted vs obvolute

convoluted

adj
  • Having numerous overlapping coils or folds; convolute. 

  • Complex, complicated, or intricate. 

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 convoluted and obvolute occurred in a corpus of books? (source: Google Ngram Viewer )