Brobdingnagian vs of considerable 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. 

of considerable size

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