invaginate vs transposition

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 

transposition

verb
  • To transpose 

  • To take on the role of another person 

noun
  • A incorporation of the provisions of a European Union directive into a Member State's domestic law. 

  • A sequence of moves resulting in a position that may also be reached by another, more common sequence. 

  • A shift of a piece of music to a different musical key by adjusting all the notes of the work equally either up or down in pitch. 

  • The act or process of transposing or interchanging. 

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