galactic vs mega

galactic

adj

  • Enormous (in size or impact). 

  • Relating to a galaxy. 

  • Of or pertaining to milk, or the secretion of milk. 

  • Relating to the Milky Way galaxy. 

mega

adj

  • Very large. 

  • Great; excellent. 

noun

  • The Steinhaus-Moser number ② 

adv

  • extremely 

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