predate vs prey

predate

verb
  • To prey upon something. 

  • To exist or to occur before something else; to antedate. 

  • To designate a date earlier than the actual one; to move a date, appointment, event, or period of time to an earlier point (contrast "postdate".) 

noun
  • A publication, such as a newspaper or magazine, that is issued with a printed date later than the date of issue. 

prey

verb
  • To act as a predator. 

noun
  • That which is or may be seized by animals or birds to be devoured 

  • A person or thing given up as a victim. 

  • A living thing that is eaten by another living thing. 

  • The victim of a disease. 

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