frazzle vs weaken

frazzle

verb
  • To fray or wear down, especially at the edges. 

  • To drain emotionally or physically. 

noun
  • A burnt fragment; a cinder or crisp. 

  • The condition or quality of being frazzled; a frayed end. 

weaken

verb
  • To make weaker or less strong. 

  • To become weaker or less strong. 

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