citrus vs gamboge

citrus

noun
  • Any of several shrubs or trees of the genus Citrus in the family Rutaceae. 

  • The fruit of such plants, generally spherical, oblate, or prolate, consisting of an outer glandular skin (called zest), an inner white skin (called pith or albedo), and generally between 8 and 16 sectors filled with pulp consisting of cells with one end attached to the inner skin. Citrus fruits include orange, grapefruit, lemon, lime, and citron. 

adj
  • Of, relating to, or similar to citrus plants or fruit. 

gamboge

noun
  • One of several species of trees of the genus Garcinia found in South and Southeastern Asia, especially Garcinia xanthochymus. 

  • The resin of the gamboge tree; a preparation of the resin used as a pigment or for medicinal purposes. 

  • A deep yellow colour. 

adj
  • Of a deep yellow colour. 

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