computer vs electronic brain

computer

noun
  • A programmable electronic device that performs mathematical calculations and logical operations, especially one that can process, store and retrieve large amounts of data very quickly; now especially, a small one for personal or home use employed for manipulating text or graphics, accessing the Internet, or playing games or media. 

electronic brain

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