intimate vs rigid

intimate

adj
  • Of or involved in a sexual relationship. 

  • Pertaining to details that require great familiarity to know. 

  • Closely acquainted; familiar. 

  • Very finely mixed. 

  • Personal; private. 

verb
  • To suggest or disclose (something) discreetly. 

  • To notify. 

noun
  • A very close friend. 

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

rigid

adj
  • Rigorous and unbending. 

  • Stiff, rather than flexible. 

  • Fixed, rather than moving. 

  • Uncompromising. 

noun
  • An airship whose shape is maintained solely by an internal and/or external rigid structural framework, without using internal gas pressure to stiffen the vehicle (the lifting gas is at atmospheric pressure); typically also equipped with multiple redundant gasbags, unlike other types of airship. 

  • A bicycle with no suspension system. 

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