long tail

noun
  1. commerce the segment of a market representing the large number of products that sell in small quantities, considered by some to be of greater financial value than the few products that sell in very large quantities

Word Origin for long tail

C21: from the appearance of typical sales patterns on a graph
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Historical Examples of long tail