drainage vs withdrawal

drainage

noun
  • A natural or artificial means for the removal of fluids from a given area by its draining away. 

  • A system of drains. 

  • A downward wind. 

withdrawal

noun
  • An act of withdrawing or a state of being withdrawn. 

  • A method of birth control which consists of removing the penis from the vagina before ejaculation. 

  • The sum of money taken from a bank account. 

  • Receiving from someone's care what one has earlier entrusted to them. Usually refers to money. 

  • A type of metabolic shock the body undergoes when a substance, usually a toxin such as heroin, to which a patient is dependent is withheld. Sometimes used with the substance as modifier. 

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