dampness vs wetness

dampness

noun
  • The degree to which something is damp or moist. 

  • Moderate humidity; moisture; moistness; the state or quality of being damp. 

wetness

noun
  • The condition of being wet. 

  • Moisture. 

  • Rainy or damp weather. 

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