evidential vs symptomatic

evidential

adj
  • Of or providing evidence. 

noun
  • A syntactic element (affix, clitic, or particle) that indicates evidentiality. 

symptomatic

adj
  • Relating to, based on, or constituting a symptom. 

  • Showing symptoms. 

  • Relating to symptomatics. 

noun
  • A person exhibiting the symptoms of an illness. 

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