convolute vs encircling

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. 

encircling

adj
  • enclosing, skirting 

noun
  • encirclement 

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