Brobdingnagian vs giant-size

Brobdingnagian

adj

  • Enormous, huge, far larger than is customary for such a thing. 

  • Of or pertaining to Brobdingnag. 

noun

  • A creature from Brobdingnag. 

  • A giant. 

giant-size

How often have the words Brobdingnagian and giant-size occurred in a corpus of books? (source: Google Ngram Viewer )