phylactery vs thought bubble

phylactery

noun
  • A speech scroll, an illustrative device depicting speech, song or other sound as if written on a scroll. 

  • Either of the two small leather cases, containing biblical scrolls, worn by Jewish men at morning prayer; the tefilla. 

  • Any small object worn for its magical or supernatural power; an amulet or charm. 

  • A case in which (Christian) relics were preserved. 

  • An enspelled object used (by such as a lich) to contain and protect the owner's soul. 

thought bubble

noun
  • A rounded or cloud-shaped outline, usually containing words, representing thought in a cartoon. 

  • An ill-conceived idea. 

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