headway vs withdrawal

headway

noun
  • The interval of time or distance between the fronts of two vehicles (e.g. buses) moving in succession in the same direction, especially along the same pre-determined route. 

  • Movement ahead or forward. 

  • Forward motion, or its rate. 

  • A cross-heading. 

  • The clearance beneath an object, such as an arch, ceiling or bridge; headroom. 

  • Progress toward a goal. 

withdrawal

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

  • An act of withdrawing or a state of being withdrawn. 

  • 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 headway and withdrawal occurred in a corpus of books? (source: Google Ngram Viewer )