invaginate vs reflect

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 

reflect

verb
  • To be bent back (light, etc.) from a surface. 

  • To mirror, or show the image of something. 

  • To bend back (light, etc.) from a surface. 

  • To be mirrored. 

  • To agree with; to closely follow. 

  • To give evidence of someone's or something's character etc. 

  • To think seriously; to ponder or consider. 

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