doable vs manageable

doable

adj
  • Possible to do; feasible. 

  • Worthy of sexual conquest. 

noun
  • Something that can be done; a possible or practical task. 

manageable

adj
  • Capable of being done or fulfilled; achievable. 

  • Capable of being managed or controlled. 

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