enchase vs infix

enchase

verb
  • To be a setting for. 

  • To decorate with jewels, or with inlaid ornament. 

  • To cut or carve, as with a weapon. 

  • To set (a gemstone etc.) into. 

infix

verb
  • To instill. 

  • To insert a morpheme inside an existing word. 

noun
  • A morpheme that always appears between other morphemes in a word, such as -i- and -o- in English (i.e. an interfix). 

  • A morpheme inserted inside an existing word, such as -bloody- in English. 

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