slackness vs tightness

slackness

noun
  • A subgenre of dancehall music with sexual lyrics. 

  • The state of being slack; the quality of having slack. 

  • Vulgarity in West Indian culture. 

tightness

noun
  • The quality or degree of being tight 

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