CPU vs analog

CPU

noun
  • The main computer case containing the central components of a personal computer. 

  • Any character or entity controlled by the game software. 

analog

noun
  • Something that bears an analogy to something else. 

  • A structural derivative of a parent compound that differs from it by only one or a few atoms or substituent groups; (usually, especially) such a molecule that retains most of the same chemical properties. 

  • An organ or structure that is similar in function to one in another kind of organism but is of dissimilar evolutionary origin. 

adj
  • In which the value of a data item (such as time) is represented by a continuous(ly) variable physical quantity that can be measured (such as the shadow of a sundial). 

  • Not relating to, or pre-dating, digital technology such as computers and the Internet; relating to real life. 

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