sinew vs weakness

sinew

noun
  • That which gives strength or in which strength consists; a supporting factor or member; mainstay. 

  • A cord or tendon of the body. 

  • A cord or string, particularly (music) as of a musical instrument. 

  • Muscular power, muscle; nerve, nervous energy; vigor, vigorous strength. 

verb
  • To knit together or make strong with, or as if with, sinews. 

weakness

noun
  • An inadequate quality; fault 

  • The condition of being weak. 

  • A special fondness or desire. 

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