deliquescent vs serous

deliquescent

adj
  • Seeming to melt away. 

  • Branching so that the stem is lost in branches, as in most deciduous trees. 

  • Becoming liquid as a phase of its life cycle. 

  • Absorbing moisture from the air and forming a solution. 

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 deliquescent and serous occurred in a corpus of books? (source: Google Ngram Viewer )