GG vs governor general

GG

intj
  • Good going; may be used genuinely or sarcastically. 

  • Good game; commonly used at the end of a gaming match; also sometimes used to end an argument. 

name
  • Gamergate 

adj
  • Likely to have an undesirable outcome, which one cannot change or escape from. 

governor general

noun
  • An official appointed by the reigning British monarch to govern a Commonwealth realm as the monarch's representative. 

  • An official in a similar position in other countries. 

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