altitude vs arcdegree

altitude

noun
  • The distance measured perpendicularly from a figure's vertex to the opposite side of the vertex. 

  • The absolute height of a location, usually measured from sea level. 

  • The angular distance of a heavenly body above our Earth's horizon. 

  • Height of rank or excellence; superiority. 

  • Highest point or degree. 

  • A vertical distance. 

arcdegree

noun
  • A unit of measurement of angle equal to ¹⁄₃₆₀ of a circle's circumference. 

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