corrugation vs rivel

corrugation

noun
  • washboarding (the appearance of ripples or bumps on a dirt or gravel road) 

  • The process of corrugating; contraction into wrinkles or alternate ridges and grooves. 

rivel

verb
  • To shrivel, wrinkle (up). 

  • To cause to be wrinkled, to shrivel. 

noun
  • A kind of small dumpling made from egg and wheat flour, often eaten in soup, especially among the Pennsylvania Dutch and other Germans. 

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