pay dirt vs topper

pay dirt

noun
  • A profitable area or period; success. 

  • Earth which contains profitable quantities of ore. 

topper

noun
  • The head or chief of an organization. 

  • A top hat. 

  • A short outer jacket worn by women or children. 

  • One who tops steel ingots. 

  • A person or tool that cuts off the top of something. 

  • A pencil sharpener. 

  • Something that is on top. 

  • A single-handed dinghy, 11 foot (3.6 metres) in length, with only one sail. 

  • A small secondary comic strip seen along with a larger Sunday strip, and usually by the same author. 

  • A three-square float, or file, used by comb-makers. 

  • The student who achieves the highest score in an examination. 

  • Something that exceeds those previous in a series, as a joke or prank. 

  • A soft, relatively thin, piece of padding placed on top of a mattress, or forming the upper layer of a mattress. 

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