moisturizing vs waning

moisturizing

noun
  • The act of making something moist; especially, of a cosmetic, making the skin or hair less dry. 

adj
  • That moisturizes. 

waning

noun
  • The fact or act of becoming less or less intense or present; fading. 

  • The fact or act of becoming smaller. 

adj
  • Becoming weaker or smaller. 

  • Of the lunar phase: as it shrinks when viewed from the Earth. 

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