discharge vs withdraw

discharge

verb
  • To expel or let go. 

  • To operate (any weapon that fires a projectile, such as a shotgun or sling). 

  • To send away (a creditor) satisfied by payment; to pay one's debt or obligation to. 

  • To relieve of an office or employment; to send away from service; to dismiss. 

  • To release (an accumulated charge). 

  • To release legally from confinement; to set at liberty. 

  • To let fly, as a missile; to shoot. 

  • To free of a debt, claim, obligation, responsibility, accusation, etc.; to absolve; to acquit; to forgive; to clear. 

  • To release (an auxiliary assumption) from the list of assumptions used in arguments, and return to the main argument. 

  • To unload a ship or another means of transport. 

  • To give forth; to emit or send out. 

  • To release (an inpatient) from hospital. 

  • To put forth, or remove, as a charge or burden; to take out, as that with which anything is loaded or filled. 

  • To set aside; to annul; to dismiss. 

  • To bleach out or to remove or efface, as by a chemical process. 

  • To release (a member of the armed forces) from service. 

  • To accomplish or complete, as an obligation. 

  • To let fly; to give expression to; to utter. 

noun
  • The volume of water transported by a river in a certain amount of time, usually in units of m³/s (cubic meters per second). 

  • The process of flowing out. 

  • The act of firing a projectile, especially from a firearm. 

  • Pus or exudate (other than blood) from a wound or orifice, usually due to infection or pathology. 

  • The act of accomplishing (an obligation) or repaying a debt etc.; performance. 

  • The act of expelling or letting go. 

  • The act of releasing an inpatient from hospital. 

  • The act of releasing an accumulated charge. 

  • The act of releasing a member of the armed forces from service. 

  • The process of unloading something. 

withdraw

verb
  • To take away or take back (something previously given or permitted); to remove, to retract. 

  • To take back (a comment, something written, etc.); to recant, to retract. 

  • To remove (someone or (reflexive, archaic) oneself) from a position or situation; specifically (military), to remove (soldiers) from a battle or position where they are stationed. 

  • To distract or divert (someone) from a course of action, a goal, etc. 

  • To cause or help (someone) to stop taking an addictive drug or substance; to dry out. 

  • To take (one's eyes) off something; to look away. 

  • To draw or pull (something) away or back from its original position or situation. 

  • To stop talking to or interacting with other people and start thinking thoughts not related to what is happening. 

  • To remove (a topic) from discussion or inquiry. 

  • Of soldiers: to leave a battle or position where they are stationed; to retreat. 

  • To extract (money) from a bank account or other financial deposit. 

  • Of a man: to remove the penis from a partner's body orifice before ejaculation; to engage in coitus interruptus. 

  • To disregard (something) as belonging to a certain group. 

  • To stop taking an addictive drug or substance; to undergo withdrawal. 

  • To stop (a course of action, proceedings, etc.) 

  • Chiefly followed by from: to leave a place, someone's presence, etc., to go to another room or place. 

  • Chiefly followed by from: to stop taking part in some activity; also, to remove oneself from the company of others, from publicity, etc. 

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