ship out vs sponge out

ship out

verb
  • To get rid of, expel, or discard. 

  • To depart, especially for a sea voyage or military assignment. 

  • To leave, get out, or resign. 

  • To send, especially by means of a transport vehicle. 

sponge out

verb
  • To remove (something, especially debts). 

  • To clean the inside of (something) by using a sponge. 

  • To remove by using a sponge. 

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