make water vs urine

make water

verb
  • To admit water; to leak. 

  • To urinate. 

urine

noun
  • Liquid waste consisting of water, salts, and urea, which is made in the kidneys, stored in the bladder, then released through the urethra. 

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