moisture vs perspiration

moisture

noun
  • The state of being moist. 

  • That which moistens or makes damp or wet; exuding fluid; liquid in small quantity. 

  • Skin moisture noted as dry, moist, clammy, or diaphoretic as part of the skin signs assessment. 

perspiration

noun
  • A saline fluid secreted by the sweat glands; sweat. 

  • The action or process of perspiring. 

  • Hard work. 

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