pruny vs rugosan

pruny

adj
  • wrinkled, especially in reference to the rugosity of digits soaked in water. 

rugosan

adj
  • Synonym of rugose: describing an extinct coral of the order †Rugosa. 

noun
  • A coral from that order. 

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