airsick vs sick to one's stomach

airsick

adj
  • Nauseated due to the effects of motion of an aircraft; suffering from motion sickness caused by air travel. 

sick to one's stomach

adj
  • Nauseated, queasy or vomiting, sick. 

How often have the words airsick and sick to one's stomach occurred in a corpus of books? (source: Google Ngram Viewer )