big-ass vs grand

big-ass

adj
  • Very large, expansive, fat, impressive, muscular, intimidating, or important. 

grand

adj
  • Great in size, and fine or imposing in appearance or impression; illustrious, dignified, magnificent. 

  • Of a large size or extent; great. 

  • Standing in the second or some more remote degree of parentage or descent (see grand-). 

  • Having higher rank or more dignity, size, or importance than other persons or things of the same name. 

  • Fine; lovely. 

  • Containing all the parts proper to a given form of composition. 

noun
  • A grand piano 

  • A grandparent or grandchild. 

  • A thousand of some unit of currency, such as dollars or pounds. (Compare G.) 

How often have the words big-ass and grand occurred in a corpus of books? (source: Google Ngram Viewer )