measles vs measlings

measles

noun
  • An acute and highly contagious disease which often afflicts children caused by the virus Measles morbillivirus and causing red rashes, fever, runny nose, coughing, and red eyes. 

  • Synonym of cysticercosis: A disease of livestock or meat caused by the presence of tapeworm larvae. 

  • A discreet assassination made to look like death from any natural cause. 

measlings

noun
  • Synonym of measles: the disease caused by M. morbillivirus, the red spots caused by the disease. 

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