invaginate vs prostrate

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 

prostrate

verb
  • To lie flat or face-down. 

  • To throw oneself down in submission. 

  • To overcome or overpower. 

  • To cause to lie down, to flatten. 

adj
  • Lying flat, face-down. 

  • Physically incapacitated from environmental exposure or debilitating disease. 

  • Trailing on the ground; procumbent. 

  • Emotionally devastated. 

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