invaginate vs subvert

invaginate

verb
  • To turn or fold inwardly. 

  • To fold inward to create a hollow space where none had existed, as with a gastrula forming from a blastula. 

  • To fold up or enclose into a sheath-like or pouch-like structure, either naturally or as part of a surgical procedure. 

adj
  • Having one portion of a hollow organ drawn back within another portion. 

  • sheathed 

subvert

verb
  • To upturn convention from the foundation by undermining it (literally, to turn from beneath). 

  • To overturn from the foundation; to overthrow; to ruin utterly. 

  • To pervert, as the mind, and turn it from the truth; to corrupt; to confound. 

noun
  • An advertisement created by subvertising. 

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