cast off vs invaginate

cast off

verb
  • To finish the last row of knitted stitches and remove them securely from the needle. 

  • To discard or reject something. 

  • To let go (a cable or rope securing a vessel to a buoy, wharf, etc.) so that the vessel may make way. 

  • To estimate the amount of space required by the type used for the given copy. 

invaginate

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

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

  • To turn or fold inwardly. 

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

  • sheathed 

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