seawater vs serous

seawater

adj
  • Associated in some way with seawater, or intended for dealing with seawater. 

  • Consisting of seawater. 

noun
  • The saltwater of a sea or ocean. 

serous

adj
  • Containing, secreting, or resembling serum; watery; a fluid or discharge that is pale yellow and transparent, usually representing something of a benign nature. (This contrasts with the term sanguine, which means blood-tinged and usually harmful.) 

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