credulous vs unsatisfied

credulous

adj
  • Believed too readily. 

  • Excessively ready to believe things; gullible. 

unsatisfied

adj
  • Not satisfied, especially with the quantity of something; dissatisfied; uncontented. 

  • Not gratified; not having been fulfilled or met. 

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