sickliness vs valetudinarianism

sickliness

noun
  • The state or characteristic of weakness, incapacity, or physical distress due to poor health, especially of a chronic nature. 

valetudinarianism

noun
  • The state, condition or habits of a valetudinarian; a state of feeble health; infirmity. 

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