coiling vs convoluted

coiling

noun
  • The pattern or motion of something that coils. 

  • The process of fitting a ship with electromagnetic coils, so that it can be degaussed while travelling. 

convoluted

adj
  • Complex, complicated, or intricate. 

  • Having numerous overlapping coils or folds; convolute. 

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