intimate vs prewarn

intimate

verb
  • To notify. 

  • To suggest or disclose (something) discreetly. 

noun
  • A very close friend. 

  • Women's underwear, sleepwear, or lingerie, especially offered for sale in a store. 

adj
  • Pertaining to details that require great familiarity to know. 

  • Closely acquainted; familiar. 

  • Very finely mixed. 

  • Of or involved in a sexual relationship. 

  • Personal; private. 

prewarn

verb
  • To warn beforehand; to forewarn. 

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