lamina vs leaf node

lamina

noun
  • the flat expanded part of a foliage leaf or leaflet 

  • either of two broad, flat plates of bone of a vertebra that is fused with and extends from the pedicle to the median line of the neural arch to form the base of the spinous process and that along with the pedicle forms the posterior part of the vertebral foramen 

  • one of the narrow thin parallel plates of soft vascular sensitive tissue that cover the flesh within the wall of a hoof 

  • a fine layer that occurs in sedimentary rocks 

leaf node

noun
  • One of the spots upon a stem where buds and intercalary meristems occur, usually marking the end of a season's growth. 

  • A node, in a tree, that has no children. 

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