equal vs satisfactory

equal

adj
  • Adequate; sufficiently capable or qualified. 

  • Intended for voices of one kind only, either all male or all female; not mixed. 

  • The same in all respects. 

  • Exactly identical, having the same value. 

noun
  • A person or thing of equal status to others. 

verb
  • To make equivalent to; to cause to match. 

  • To have as its consequence. 

  • To be equal to, to have the same value as; to correspond to. 

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 equal and satisfactory occurred in a corpus of books? (source: Google Ngram Viewer )