infix vs inoculate

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. 

inoculate

verb
  • To safeguard or protect something as if by inoculation. 

  • To introduce into the mind (used especially of harmful ideas or principles). 

  • To graft by inserting buds. 

  • To introduce an antigenic substance or vaccine into something (e.g. the body) or someone, such as to produce immunity to a specific disease. 

  • To add one substance to another. 

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