afloat vs seawater

afloat

adv
  • Floating. 

  • Covered with water (bearing floating objects). 

  • Floating in the air; flowing freely; not tied, braided, etc. 

  • Having enough money to continue to operate; (of a private individual, family, etc.) able to pay one's expenses, able to keep one's head above water. 

  • In a vessel at sea or on another body of water. 

  • Covered, overspread (with or in something). 

seawater

adj
  • Associated in some way with seawater, or intended for dealing with seawater. 

  • Consisting of seawater. 

noun
  • The saltwater of a sea or ocean. 

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