eligible vs satisfactory

eligible

noun
  • One who is eligible. 

adj
  • Allowed to and meeting the necessary conditions required to participate in or be chosen for something 

  • Worthy of being chosen (for marriage). 

satisfactory

noun
  • Somebody or something that meets requirements without exceeding them. 

  • The rating given to somebody or something that meets requirements without exceeding them. 

adj
  • Causing satisfaction; agreeable or pleasant; satisfying. 

  • Done to satisfaction; adequate or sufficient. 

  • Making atonement for a sin; expiatory. 

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