engraft vs fixate

engraft

verb
  • To fix firmly into place 

  • To insert, as a scion of one tree or plant into another, for the purpose of propagation; graft onto a plant 

adj
  • Engrafted. 

fixate

verb
  • To make something fixed and stable; to fix. 

  • To attach oneself to a person or thing in a pathological or neurotic manner; used with on. 

  • To attend to something to the exclusion of all others; used with on. 

  • To stare fixedly at something. 

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