capstone vs coronate

capstone

verb
  • To complete as a crowning achievement; to top off. 

  • To train in the Capstone Military Leadership Program. 

noun
  • A crowning achievement, culmination or finishing touch. 

  • Any of the stones making up the top layer of a wall; a coping stone. 

coronate

verb
  • To crown (a sovereign). 

adj
  • Having a crest or a crownlike appendage. 

  • Having the coronal feathers lengthened or otherwise distinguished. 

  • Having or wearing a crown; crowned. 

  • Girt about the spire with a row of tubercles or spines. 

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