digital vs electronic brain

digital

noun
  • Any of the keys of a piano or similar instrument. 

  • A digital option. 

  • Digital equipment or technology. 

  • A finger. 

adj
  • Having to do with digits (fingers or toes); performed with a finger. 

  • Property of representing values as discrete, often binary, numbers rather than a continuous spectrum. 

  • Of or relating to computers or the Information Age. 

electronic brain

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