membrane vs recto

membrane

noun
  • A piece of parchment forming part of a roll. 

  • A flexible or semiflexible covering or waterproofing whose primary function is to exclude water. 

  • A mechanical, thin, flat flexible part that can deform or vibrate when excited by an external force. 

  • A microscopic double layer of lipids and proteins forming the boundary of cells or organelles. 

recto

noun
  • The front side of a flat object which is to be examined visually, as for reading, such as a sheet, leaf, coin or medal. 

  • The right-hand page of a book of a script which reads from left to right, usually having an odd page number. 

  • A writ of right. 

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