flaw vs weakness

flaw

noun
  • A defect or error in a contract or other document which may make the document invalid or ineffective. 

  • A storm of short duration. 

  • An inclusion, stain, or other defect of a diamond or other gemstone. 

  • A sudden burst of noise and disorder 

  • A crack or breach, a gap or fissure; a defect of continuity or cohesion. 

  • A defect, fault, or imperfection, especially one that is hidden. 

  • A sudden burst or gust of wind of short duration; windflaw. 

verb
  • To add a flaw to, to make imperfect or defective. 

  • To become imperfect or defective; to crack or break. 

weakness

noun
  • An inadequate quality; fault 

  • The condition of being weak. 

  • A special fondness or desire. 

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