alter ego vs china

alter ego

noun
  • Somebody's alternate personality or persona; another self. 

  • A very close and intimate friend. 

  • A corporation used by a person to conduct personal business in an attempt to shield himself or herself from personal liability, and which a court may penetrate by "piercing the corporate veil" to impose liability on the person when they commit fraud or injustice. 

china

noun
  • Synonym of mate (rhyme of china-plate). 

  • Synonym of porcelain, a hard white translucent ceramic made from kaolin, now (chiefly US) sometimes distinguished in reference to tableware as fine or good china. 

  • Synonym of China rose, in its various senses. 

  • A kind of drum cymbal approximating a Chinese style of cymbal, but usually with Turkish influences. 

  • Chinaware: porcelain tableware. 

  • Synonym of China root, the root of Smilax china (particularly) as a medicine. 

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