plait vs plicate

plait

verb
  • To fold; to double in narrow folds; to pleat 

  • To interweave the strands or locks of; to braid 

noun
  • A flat fold; a doubling, as of cloth; a pleat. 

  • A braid, as of hair or straw; a plat. 

plicate

verb
  • To fold or pleat (usually used in passive). 

adj
  • Folded multiple times lengthwise like a fan, usually lending stiffness to a flat structure such as a leaf; corrugated; pleated. 

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