cunning vs string to one's bow

cunning

noun
  • Practical knowledge or experience; aptitude in performance; skill, proficiency; dexterity. 

  • The natural wit or instincts of an animal. 

  • The disposition to employ one's skill in an artful manner; craftiness; guile; artifice; skill of being cunning, sly, conniving, or deceitful. 

  • Practical skill employed in a secret or crafty manner; craft; artifice; skillful deceit; art or magic. 

adj
  • Sly; crafty; clever in surreptitious behaviour. 

string to one's bow

noun
  • A skill, ability or resource. 

  • A lover, paramour or suitor. 

How often have the words cunning and string to one's bow occurred in a corpus of books? (source: Google Ngram Viewer )