scarify vs spook

scarify

verb
  • To harrow the feelings. 

  • To remove thatch (build-up of organic matter on the soil) from a lawn, to dethatch. 

  • To break up, loosen, or roughen the surface of a field or road or a hard surface. 

  • To scratch, etch, burn, or cut designs into one's skin as a form of body modification. 

  • To damage the testa (seed coat) of a seed by cutting, scraping, chemicals, hot water, or fire to allow permeation of water and faster germination. 

  • To make scratches or cuts on. 

spook

verb
  • To haunt. 

  • To frighten or make nervous (especially by startling). 

  • To become frightened (by something startling). 

noun
  • A ghost or phantom. 

  • An undercover agent or spy. 

  • A hobgoblin. 

  • A scare or fright. 

  • A psychiatrist. 

  • A player who engages in hole carding by attempting to glimpse the dealer's hole card when the dealer checks under an ace or a 10 to see if a blackjack is present. 

  • A metaphysical manifestation; an artificial distinction or construct. 

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