mu vs nonlife

mu

noun
  • Nothingness; nonexistence; the illusory nature of reality. 

  • The 12th letter of the Modern Greek alphabet. 

  • A unit of surface area, currently equivalent two-thirds of a decare (about 666 meters squared). 

intj
  • Neither yes nor no. 

nonlife

noun
  • A life so devoid of meaning or activity that it is barely worth living. 

  • All objects or substances except those considered alive. 

adj
  • Relating to types of insurance which are not life insurance 

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