buyer vs proveditor

buyer

noun
  • A person who purchases items consumed or used as components in the manufacture of products. 

  • A person who purchases items for resale in a retail establishment. 

  • A person who makes one or more purchases. 

proveditor

noun
  • One employed to procure supplies, as for an army, a steamer, etc.; a purveyor; one who provides for another. 

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