slackness vs what it takes

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. 

what it takes

noun
  • Everything that is required. 

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