intimate vs underwear

intimate

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

  • A very close friend. 

verb
  • To suggest or disclose (something) discreetly. 

  • To notify. 

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. 

underwear

noun
  • Underpants (boxers, briefs, panties, etc) and often bras. 

  • Clothes worn next to the skin, underneath outer clothing. 

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