Ruby vs essential

Ruby

noun
  • A curry; Short for Ruby Murray. 

name
  • A male given name. 

  • A female given name from English. 

  • A dynamic, reflective, general-purpose object-oriented programming language developed in the 1990s. 

  • A town in Wisconsin. 

  • A surname. 

  • A settlement on the island of Saint Croix in the United States Virgin Islands. 

  • A town in South Carolina. 

  • A ghost town in Arizona 

  • A city in Alaska. 

essential

noun
  • A necessary ingredient. 

  • A fundamental ingredient. 

adj
  • Necessary. 

  • Necessary for survival but not synthesized by the organism, thus needing to be ingested. 

  • Being in the basic form; showing its essence. 

  • Really existing; existent. 

  • Very important; of high importance. 

  • Having the nature of essence; not physical. 

  • Such that each complementary region is irreducible, the boundary of each complementary region is incompressible by disks and monogons in the complementary region, and no leaf is a sphere or a torus bounding a solid torus in the manifold. 

  • Idiopathic. 

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