invaginate vs topsy-turvy

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 

topsy-turvy

verb
  • To turn topsy-turvy or upside down; to invert. 

  • To throw into chaos or disorder; to upset. 

adj
  • Chaotic; disorderly. 

  • Backwards or upside down. 

adv
  • Backwards or upside down; also, having been overturned or upset. 

  • Not in the natural order of things; in a disorderly manner; chaotically. 

noun
  • An act of turning something backwards or upside down, or the situation that something is in after this has happened. 

  • A situation where the natural order of things has been upset. 

  • Chaos, confusion, disorder. 

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