racy vs triple-X

racy

adj
  • Mildly risqué. 

  • Involving a data race or a race condition. 

  • Having a strong flavor indicating origin; of distinct characteristic taste; tasting of the soil. 

  • Exciting to the mind by a strong or distinctive character of thought or language; peculiar and piquant; fresh and lively. 

triple-X

How often have the words racy and triple-X occurred in a corpus of books? (source: Google Ngram Viewer )