duration vs timer

duration

noun
  • An amount of time or a particular time interval. 

  • The time taken for the current situation to end, especially the current war 

  • A measure of the sensitivity of the price of a financial asset to changes in interest rates, computed for a simple bond as a weighted average of the maturities of the interest and principal payments associated with it. 

timer

noun
  • One characterized by a certain time or time frame, such as their work hours. 

  • Any electronic function that causes a device to be able to do something automatically after a preset amount of time. 

  • A device used to measure amounts of time. 

  • A person who records the time elapsed in a sporting event. 

  • One who has done something a certain number of times. 

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