getter vs obtainer

getter

noun
  • One who, or that which, gets. 

  • A function used to retrieve the value of some property of an object, contrasted with the setter. 

  • A material which is included in a vacuum system or device for removing gas by sorption. 

  • A miner who dug coal, contrasted with the putter, who took it to the surface. 

verb
  • To remove gas by sorption. 

obtainer

noun
  • One who obtains. 

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