contracting vs sinking

contracting

noun
  • The act of something that contracts or shrinks; contraction. 

  • Work done on a contract basis. 

adj
  • Getting smaller; drawing itself together into a smaller area. 

sinking

noun
  • The process by which something sinks, or is sunk. 

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