examination vs wringer

examination

noun
  • Particularly, an inspection by a medical professional to establish the extent and nature of any sickness or injury. 

  • Interrogation, particularly by a lawyer in court or during discovery. 

  • The act of examining. 

  • A formal test involving answering written or oral questions under a time constraint and usually without access to textbooks; typically, a large, written test administered to high school and college students covering course material studied in a semester. 

wringer

noun
  • Something that causes pain, hardship, or exertion; an ordeal. 

  • One who wrings. 

  • A device for drying laundry consisting of two rollers between which the wet laundry is squeezed (or wrung); a mangle. 

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