describe vs specify

describe

verb
  • To represent in words. 

  • To give rise to a geometrical structure. 

  • To introduce a new taxon to science by explaining its characteristics and particularly how it differs from other taxa. 

  • To represent by drawing; to draw a plan of; to delineate; to trace or mark out. 

specify

verb
  • To state explicitly, or in detail, or as a condition. 

  • To bring about a specific result. 

  • To include in a specification. 

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