mandarin orange vs titian

mandarin orange

noun
  • A small citrus tree (Citrus reticulata) with fruit resembling the orange. 

  • The fruit of this tree, smaller than an orange and oblate. In daily usage, it may include other similar citrus fruits like Citrus unshiu (satsuma or mikan) Citrus tangerina (tangerine). 

titian

noun
  • A bright auburn colour, tinted with gold. 

adj
  • Of a bright auburn colour, tinted with gold, especially in reference to hair. 

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