allowable vs satisfactory

allowable

adj
  • Appropriate; satisfactory; acceptable. 

  • Intellectually admissible; valid; probable. 

  • Able to be added or deducted in consideration of something. 

  • Permissible; tolerable; legitimate. 

noun
  • permitted amount or activity. 

satisfactory

adj
  • Done to satisfaction; adequate or sufficient. 

  • Causing satisfaction; agreeable or pleasant; satisfying. 

  • Making atonement for a sin; expiatory. 

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

  • Somebody or something that meets requirements without exceeding them. 

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