evidential vs ominous

evidential

adj
  • Of or providing evidence. 

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

ominous

adj
  • Specifically, giving indication of a coming ill; being an evil omen 

  • Of or pertaining to an omen or to omens; being or exhibiting an omen; significant. 

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